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camracer 00:02:14 Tue Apr 26 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: DUBB at 19:57:57 Mon Apr 25 2011 Putting a washer, or something, on the barrel side of the plastic body, so that the barrel screws down in a different position than it did, and thus moves that bad spot out of it's current position, that might help, too. Paticularly if you fill in that hole with JB Weld, so the bb's don't hit it there, anymore. There must be some way to get a washer in someplace, that will accomplish that. Since the thread pitch is fine, it won't take much, and shouldn't adversely effect anything. Too bad you don't have an oxy-acetylene rig, or you could gas weld that hole in with some coathanger wire. That's what I would do. A little bit to seal up that crack up by the threads, too. Probably wouldnt even need wire for that, just get it red hot, and mash it together. That would anneal the steel again, too, so it wouldn't be as brittle. Quench it in water while it is still glowing, and that will harden it so its not too soft, but still annealed, and it should be good to go. Thought about the three breech nut washers in my "dream-time" . Maybe adding another "shim" or two to align the mag head to the breech better. ...hhhhmmmnnnn... ...Think alignment is better between the breech nut/mag head guide "groove" seat (sorry for lack of a better description). I think there needs to be a "finessing" of that seat to get the best alignment, especially for a NEW breech or mag head each time. That needs to be done custom-fit for every gun, unfortunately. (Poor design, Sorry Russian engineers!) I have used a drill bit of the bore size to help me align the mag head with the barrel. I had that horrible damage to the barrel with my prototype mag because the weight of eight pounds of bb's pull the alignment out of place. I have a s [ Continued ] View Rest Of Post --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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DUBB 19:57:57 Mon Apr 25 2011 Offline 2255 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Putting a washer, or something, on the barrel side of the plastic body, so that the barrel screws down in a different position than it did, and thus moves that bad spot out of it's current position, that might help, too. Paticularly if you fill in that hole with JB Weld, so the bb's don't hit it there, anymore. There must be some way to get a washer in someplace, that will accomplish that. Since the thread pitch is fine, it won't take much, and shouldn't adversely effect anything. Too bad you don't have an oxy-acetylene rig, or you could gas weld that hole in with some coathanger wire. That's what I would do. A little bit to seal up that crack up by the threads, too. Probably wouldnt even need wire for that, just get it red hot, and mash it together. That would anneal the steel again, too, so it wouldn't be as brittle. Quench it in water while it is still glowing, and that will harden it so its not too soft, but still annealed, and it should be good to go. --- In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones. I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself! Thus my handwriting: cryptic scribble that not even I can read!

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camracer 10:38:56 Fri Apr 22 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: windage at 05:26:16 Fri Apr 22 2011 It's not so bad. Just squish that thread back and fill the hole with JBweld. LOL On a serious note, I have noticed some hammering in mine but I haven't shot thousands of BB's yet. Hi windage! Heh, heh! JB Weld fixes EVERYTHING!! Keep an eye on the pattern of wear. I would suggest you mark the orientation of the top of your barrel. That will help to narrow down how you need to align your mag head to the breech. I filed a mark on the top of my barrel. Check for wear every long shooting session or 4000 shots. If you get a pattern starting to show like mine (actually you won't let it get that bad!), you'll know the bb alignment is high, low, left, right, etc. Keep an eye on the breech gasket also. I think they crack first in that area of damage (theory only though, could also be the pounding from HPA alone!). ---Cam --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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windage 05:26:16 Fri Apr 22 2011 Offline 313 posts BBMG Major General ** Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: camracer at 18:44:02 Wed Apr 20 2011 Got my damaged barrel off using the "vise" method. Check this out: It's not so bad. Just squish that thread back and fill the hole with JBweld. LOL On a serious note, I have noticed some hammering in mine but I haven't shot thousands of BB's yet.

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camracer 10:44:45 Thu Apr 21 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: radical at 21:06:46 Wed Apr 20 2011 Heres a look at my barrel break. Was thin as foil but tough steel. NO WAY to remove the original barrel remainder which likely were pounded into the threads buy POS Crosman BB's,Havent used them since and no more problems http://bb.bbboy.net/straferbbmachinegunownersgroup-viewthread?forum=10&thread=239&postnum=0&highlight=This%20is%20a%20sad%20day Scroll down a bit for the attatchment-Rad That is so damaged I would not know what it was, if you didn't say what it was! ....wow --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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camracer 10:39:57 Thu Apr 21 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: SONYtec at 21:03:12 Wed Apr 20 2011 It looks like the barrel was made poorly in the breach area. I wonder if this may be an earlier JimC barrel, not hardened as well? ...hhhmmmnnn. Anyway, It has been getting hammered for a while! Hardened properly or not, damage would have occurred. ---Cam --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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radical 21:06:46 Wed Apr 20 2011 Offline 5156 posts BBMG LIFER Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Heres a look at my barrel break. Was thin as foil but tough steel. NO WAY to remove the original barrel remainder which likely were pounded into the threads buy POS Crosman BB's,Havent used them since and no more problems http://bb.bbboy.net/straferbbmachinegunownersgroup-viewthread?forum=10&thread=239&postnum=0&highlight=This%20is%20a%20sad%20day Scroll down a bit for the attatchment-Rad [3 edits; Last edit by radical at 21:12:18 Wed Apr 20 2011]

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SONYtec 21:03:12 Wed Apr 20 2011 Offline 3691 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper It looks like the barrel was made poorly in the breach area. --- 10/02/08 Black '05 Drozd STOCK. 3/13/08 YELLOW '03 DROZD, 9/17/08 full auto mod, 1, 3, Full. ROF mod soon. 07/07 Black '05 Drozd, 8/3/07 resistor mod, 9/20/07 full auto PCB. More to come! (Adjust pot. and solenoid) Accessories: 8/24/07 PMI HPA tank, remote hose, 9/03/08 JimC barrels and QD adaptors, 10/01/08 JimC CAR stock adaptor. NEED HI-CAP MAGS!!!

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rkr 20:17:53 Wed Apr 20 2011 Offline 345 posts BBMG Major General ** Reply	Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Any idea whether the damage is above or below the feed hole? I'd guess below since the lip and "dimple" position pushes BBs downwards. Actually I think it also cause them to have backspin, not good for accuracy.
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drozdandconfused 19:46:48 Wed Apr 20 2011 Offline 759 posts BBMG General **** Reply	Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Wow, is that dent what it looks like in the picture? I never had them all hitting the same spot, my damage was all over the place.
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camracer 18:44:02 Wed Apr 20 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Got my damaged barrel off using the "vise" method. Check this out: Reinforces the need to align your barrel folks! That breech would have flaked away just like Drozdandconfused's did very soon. I caught it in time. Wanna put the word out to everyone using HPA.....Watch it! Check your barrel after EACH shooting session, or after every 4000 shots!! It's easy to do, before things go wrong! If you feel lazy and don't want to remove the barrel, try loosening it a few full revolutions and see if it is becoming harder to unscrew from the breech nut. I noticed the accuracy slowly becoming worse and worse. Use that as a guide as to when to check it also. ---Cam --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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camracer 15:28:59 Sun Apr 10 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: drozdandconfused at 15:07:51 Sun Apr 10 2011 Quote: cam Got another problem to work on. When I went to remove my 23" barrel, (for dis-assembly to add the capacitor), No Go! It has become "welded" to the breech nut. I saw this coming. bb hammering has finally distorted the threads on the barrel to the point of no removal. Damn! I should have replaced it when I first noticed a slight bind in the threads! I will be ordering a new barrel and breech nut tomorrow. I'll now have to cut the barrel out. Sh!t!... Drozdandconfused had the same issue. It's an alignment issue with my mag head that needs to be fixed. Goes to say how important mag head to breech alignment is! I'll keep using this barrel/breech until I get the new one, then I'll post photos of what damage is going on, so others may avoid my ignorance! I saw it coming but pushed it too far. Paying the price now! ---Cam I didn't want to go off subject on the New Mag thread so I brought this one up. Cam, what psi were you shooting, and did you notice the pressure creeping up on your output gauge after the gun was sitting pressurized for any length of time? I really think it has to do with higher pressures. Alignment helps, but the bbs don't all go the exact same trajectory out of the mag head, there will still be impact on the barrel breach. It's inherent in the design. Anyway, that's a bummer. If you haven't already got it out, check the vise trick I used (picture in this thread) to help hold the barrel nut secure so you don't crack the frame. Hey Brother! Good to hear form you. Well, I've been [ Continued ] View Rest Of Post --- 2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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drozdandconfused 15:07:51 Sun Apr 10 2011 Offline 759 posts BBMG General **** Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: cam Got another problem to work on. When I went to remove my 23" barrel, (for dis-assembly to add the capacitor), No Go! It has become "welded" to the breech nut. I saw this coming. bb hammering has finally distorted the threads on the barrel to the point of no removal. Damn! I should have replaced it when I first noticed a slight bind in the threads! I will be ordering a new barrel and breech nut tomorrow. I'll now have to cut the barrel out. Sh!t!... Drozdandconfused had the same issue. It's an alignment issue with my mag head that needs to be fixed. Goes to say how important mag head to breech alignment is! I'll keep using this barrel/breech until I get the new one, then I'll post photos of what damage is going on, so others may avoid my ignorance! I saw it coming but pushed it too far. Paying the price now! ---Cam I didn't want to go off subject on the New Mag thread so I brought this one up. Cam, what psi were you shooting, and did you notice the pressure creeping up on your output gauge after the gun was sitting pressurized for any length of time? I really think it has to do with higher pressures. Alignment helps, but the bbs don't all go the exact same trajectory out of the mag head, there will still be impact on the barrel breach. It's inherent in the design. Anyway, that's a bummer. If you haven't already got it out, check the vise trick I used (picture in this thread) to help hold the barrel nut secure so you don't crack the frame.

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camracer 14:54:39 Sun Jan 2 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: drozdandcnofused Good question. Has anyone else tried those zincs from the new 6,000 package? I did notice one difference in the labeling. The old 4,000 pack says "BBs made in China" "Packaged in the U.S.A." The new 6,000 pack just says "Made in China." When I started using these, was when I started getting the most sparks. One other note, I'm doing all this testing/shooting @ 800 psi. DnC, I have not gotten any 6000 count packages, been only using the 4000 count. Where are you buying 6000 count? How much are you spending? At Pyramid Air If you buy three 4000 count you get one free (all the time). At $7.69 a pack plus shipping I get 16,000 for $32.88. Is there a better deal out there for 6000 count Daisy's? ---Cam

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drozdandconfused 18:18:42 Sat Jan 1 2011 Offline 759 posts BBMG General **** Reply

Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper I do clean every new barrel/gun that I get. I have also noticed what seemed to be a smaller diameter muzzle end of the JimC barrel using the pin gauges. I wasn't sure if it was intentional as choked barrels are great with lead projectiles. It would even be good with bbs considering the small diameter of the zincs .171 - .174 compared to the barrels .176 bore. I'm pretty sure that the sparks I'm getting now are a combination of the barrels being new, and even tho' I've cleaned them, there may be some off that stuff that causes the drag left inside, as I've not been able to find good quality cleaning tools/brushes for .177 cal. Some of the stuff that I cleaned out of the new barrel seemed like residual from the hot bluing. When I get a chance to shoot more, I think the sparks will stop. Quote: camracer "Why hasn't anyone else had these problems?" Good question. Has anyone else tried those zincs from the new 6,000 package? I did notice one difference in the labeling. The old 4,000 pack says "BBs made in China" "Packaged in the U.S.A." The new 6,000 pack just says "Made in China." When I started using these, was when I started getting the most sparks. One other note, I'm doing all this testing/shooting @ 800 psi. Quote: camracer DnC, I can't stop wondering if you just got a SH!T deal with your mags and aftermarket parts. Wouldn't surprise me, they both came from the same place, but six months apart, with 3,255 guns built between them. I thought about ordering new mag heads, and probably will, but as I've found, it's a crap shoot on quality. Quote: TBK How much material did you ha [ Continued ] View Rest Of Post Mood: windage 04:00:43 Sat Jan 1 2011 Offline 313 posts BBMG Major General ** Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper I never bothered to clean the inside of my new JimC barrel when I first got it. My accuracy was not all that good. One day, early last fall, I noticed when checking ID of my barrels, that the JimC barrel was not the same all the way through the barrel. The BB would drag a bit in the middle of the barrel and then near the end. I physically took a bore light and checked the inside and then I noticed how dirty it was. I cleaned it out very good and with the first few patches they were just black. I also used a bore brush and scubbed the hell out of it. I tested afterwards and the drag had disappeared! When I went out shooting afterwards, the accuracy was a big improvement. I posted the results with the targets on another thread here in this forum. 2" groups at 45 feet seemed reasonable to me. Mood: camracer 01:32:35 Sat Jan 1 2011 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: drozdandconfused at 18:02:39 Fri Dec 31 2010 Some progress here. I did a full barrel alignment on one gun. It involved cutting the two stops on the mag head, and cutting out some material inside the bb exit hole. Unfortunately, I only did the JB Weld bb alignment on this gun and get roll outs on almost every shot. But so far the accuracy seems very good. There were also sparks, but I think that is because the barrel is new and the bbs are the .174 size. The gun with cam's magnet mod works flawlessly. Didn't do the full alignment yet for this one cause I'm not sure if it needs it. Got even more sparks with this one, but it is also a new barrel. Accuracy seems better. More tests to come. DnC, I can't stop wondering if you just got a SH!T deal with your mags and aftermarket parts. I wish you were next door so I could run over and see it! (...you could drop it by my parent's house ) JEEES! You poor guy! Something is super wrong, wrong, wrong! The question: "Why hasn't anyone else had these problems?", keeps me awake at night, Pal! Will Still try to help you solve the problem, though! More sparks? wow...Is that one that you tried to fix? I'll help however I can. Let Me know! ---Cam [1 edits; Last edit by camracer at 01:33:25 Sat Jan 1 2011] Mood: Mood Now: ( Rocking ) Tbkahuna 18:29:28 Fri Dec 31 2010 Offline 1671 posts BBMG MASTER BLASTER +1000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper How much material did you have to remove? Keep checking the barrel breech!!! New mag heads aren't too terribly priced. I think they were less than $15. You could go the full monty! TBK Mood: drozdandconfused 18:02:39 Fri Dec 31 2010 Offline 759 posts BBMG General **** Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Some progress here. I did a full barrel alignment on one gun. It involved cutting the two stops on the mag head, and cutting out some material inside the bb exit hole. Unfortunately, I only did the JB Weld bb alignment on this gun and get roll outs on almost every shot. But so far the accuracy seems very good. There were also sparks, but I think that is because the barrel is new and the bbs are the .174 size. The gun with cam's magnet mod works flawlessly. Didn't do the full alignment yet for this one cause I'm not sure if it needs it. Got even more sparks with this one, but it is also a new barrel. Accuracy seems better. More tests to come. Mood: drozdandconfused 17:06:34 Thu Dec 23 2010 Offline 759 posts BBMG General **** Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: TBK I think the barrel nut angle you see in your picture is due to the thread tolerance being a little loose. It should square up when it is tightened. When I first discovered this I thought the same thing, that it would square up on the plastic frame. And yes, the threads on the JimC barrel are much looser in the nut than the stock barrel. When I tested the "crooked nut" in my gun, it almost looked square to the eye, but it is not. Both my original barrel nuts line up square. I'm not sure if it is because they've been used and/or abuse (all the damage from the hammering) but the threads on the old barrel nuts have a lot more play than the new one does. Since this is all about aligning I'm not going to risk it. TBK, the 2 "L" idea sounds great. Since we are exceeding the manufacturers intended pressures and rpm's, voltage, etc. Tightening up all the weak links in this area is a good idea! I'm doing mine 1 gun at a time, and after I'm done aligning everything my mags will probably not be interchangeable because I going to tweak each one to its specific gun. Lots to do! Mood: camracer 14:33:40 Thu Dec 23 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper DnC, as for the barrel nut/barrel alignment-- Mine are PERFECTLY square (on both the JimC barrel and the barrel that came with the gun). Mood: Mood Now: ( Rocking ) camracer 14:22:34 Thu Dec 23 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: Tbkahuna at 02:58:15 Thu Dec 23 2010 You can adjust the up and down of the mag alignment with a set screw through the plastic frame from the top. If it needs to go down, like mine does, then that will also tighten up the latch end of the mag. Just a thought. Or... what about... TBK TBK, I like your "screw" Idea. That sounds like the easiest/quickest way to make a downward adjustment. [1 edits; Last edit by camracer at 14:23:11 Thu Dec 23 2010] Mood: Mood Now: ( Rocking ) Tbkahuna 02:58:15 Thu Dec 23 2010 Offline 1671 posts BBMG MASTER BLASTER +1000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper I think the barrel nut angle you see in your picture is due to the thread tolerance being a little loose. It should square up when it is tightened. DNC photo #1 - the top of my mag head is canted like that as received. The gasket shadow on the front of my mag head is high like yours. As far as the side-to-side alignment, (one of) my fancy rebuild ideas of the barrel nut was going to have the "L" shaped claw on both sides. The recess for the other side of the mag head just hasn't been cut. The recess is a little less than .070" deep. The mag head is symmetrical, so that material should be removable on the other side, too. I want to use a thin UHMW plastic disk as a gasket that would allow the 2 "L" hooks to snug the mag face against a new/modified barrel nut. You can adjust the up and down of the mag alignment with a set screw through the plastic frame from the top. If it needs to go down, like mine does, then that will also tighten up the latch end of the mag. Just a thought. Or... what about... TBK Mood: camracer 01:39:20 Thu Dec 23 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Alright DnC!, To you're first comment: GOOD EYE! Yeah you can see the gasket print on the mag head! You Are "Dick Tracy"! Your photo seems to have the same (that I can barely see?). But, OK..... The Photo that you see is from the NEW 30 round clip mag that has NEVER BEEN USED! ....HHMMNN, DnC!!!! That gasket mark is on there NEW!!! I wonder what's goin' on at Baikal!! Sh!t you have a good eye! If you get a new mag head TAKE A PHOTO before it is used!! Wow! Your point #2: I can TOTALLY see from your photo that the grind is uneven!! That mag head looks WORSE than ANY of mine!!! I can easily see that the left side grind is lower than the right side. That seems to be the trend with mine also! Hey, is the top of your mag the one you ground down for your magnet mod? The top edge is not square. (I'm sure that's why, right?) Not a critical area anyway. Your photo #2: All I have to say is WTF!! Wow that is UNACCEPTABLE!!!! What a Joke! INDEED!! Dude, You CANNOT be THAT unlucky!! I will check my alignment like that tomorrow and let you know what's up with mine as "cross-reference". Your last thought for the paint test, another great idea! Just need paint that won't get "blown" off at high psi. GOOD POST DnC!! More to come tomorrow morning. Later, ---Cam Mood: Mood Now: ( Rocking ) drozdandconfused 17:26:18 Wed Dec 22 2010 Offline 759 posts BBMG General **** Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Excellent picture cam. I couldn't find any decent annotating features in photobucket. You're lucky yours line up. I had a feeling they would all be different as usual. Looking at the barrel gasket ring on your mag head, it looks like it is sitting low. The good thing is, if your bb is aligned in the mag head close to the top of the oversized exit hole, and the pin gauge goes through, then your bb should go straight in to the bore as desired. I like the idea of doing one side first. Sometime ago I noticed that my mag heads look like they lean to one side: This one appears to lean to the right from the bore and thread being slightly off. It also correlates to the fact that my mag exit hole is to that side when I observe the barrel gasket ring. I laid them on a flat steel surface and tested. Not as bad as I thought, about 2 thou. Removing one side at a time when I trim the mag head stop points may help to correct this. On the same note of Baikal drilling and tapping, after all the damage done to my barrels I ordered 2 new barrel nuts from EAA. They sent me one. When I screwed it onto my new barrel I immediately noticed: this POS is drilled so poorly, it is off by 15 thou. What a joke. This should be going into the trash bin, but I threw it into the spare parts bin cause you never know. I'm going to used the old one because it lines up better. I did my initial pin tests with the barrel and nut out of the gun. I will do all my final cutting and alignment with the top off the gun until I get it right. You can also put some light paint or whiteout on the breech and test fire one shot to see where the bb hits or hopefully doesn't hit. I have a feeling that when this is done, my guns will be a hell of a lot more accurate on top of the real goal of preventing damage! [1 edits; Last edit by drozdandconfused at 17:27:50 Wed Dec 22 2010] Mood: camracer 19:06:32 Tue Dec 21 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper OK DnC, I did some testing like you did: Quote: drozdandconfused at 05:27:05 Tue Dec 21 2010 We did use some pin gauges to check alignment of the breach to the barrel and guess what, they're off by about 10 thou. OK DnC, I did some test to back up your findings: First we used a .176 pin which is about 4" long, put it in the barrel with the barrel nut screwed on, attached the mag head to the barrel nut the same way it aligns in the gun, then took a cleaning rod to push the gauge into the .180 bb exit hole on the mag head. No way, no how. No until we put in a much smaller gauge would it even go in. What does this all mean? I'm not sure if all of these guns are the same in this respect, but on mine, even if my bb is perfectly aligned in the exit hole, it will still slam into the lower tapered portion of the barrel. If you look at the mag head there are machined slots for the fit to the barrel nut. On mine, first I will remove 5 thou on each side test it, the another 5 thou until it aligns with the barrel bore. I used a drill bit that just fits the JimC barrel as my "pin gauge".I did the procedure you did above with the four mag heads I have. In this photo, I did measurements from point "A" to the bottom of the mag head, and "B" to the bottom also. And I measured the exit holes on each. Here's what I got. #1 Blackbird mag: Exit hole .178", A= .4210" B= .4194" #2 30 round clip : Exit hole .179", A= .4415" B= .4465" #3 Prototype mag: Exit hole .179", A= .4310" B= .4310" #4 unused 30 round clip: Exit hole .182" A= .4335" B= .4350" The oldest mag head (most used) is on my prototype now. And the newest is the unused 30 round clip. As we can see tolerances are ALL OVER th [ Continued ] View Rest Of Post Mood: Mood Now: ( Rocking ) drozdandconfused 05:27:05 Tue Dec 21 2010 Offline 759 posts BBMG General **** Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Met with a machinist yesterday about barrel modding ideas. Keep in mind he has no firearms experience, but an amazing shop with every tool you can imagine. The replaceable breach is possible but would be an expensive task. He said you could probably make it out of a tool grade steel, harden it, but drilling the hole exact is very time consuming and there would be limited material left after drilling and tapping the threads if using a JimC barrel as they are a smaller diameter than the stock barrel. We did use some pin gauges to check alignment of the breach to the barrel and guess what, they're off by about 10 thou. First we used a .176 pin which is about 4" long, put it in the barrel with the barrel nut screwed on, attached the mag head to the barrel nut the same way it aligns in the gun, then took a cleaning rod to push the gauge into the .180 bb exit hole on the mag head. No way, no how. No until we put in a much smaller gauge would it even go in. What does this all mean? I'm not sure if all of these guns are the same in this respect, but on mine, even if my bb is perfectly aligned in the exit hole, it will still slam into the lower tapered portion of the barrel. If you look at the mag head there are machined slots for the fit to the barrel nut. On mine, first I will remove 5 thou on each side test it, the another 5 thou until it aligns with the barrel bore. I will then probably have to add some material or do a mod similar to camracer's on the mag latch to make it sit slightly higher. There is plenty of room above the mag head between the gun frame but I only need 10 thou then I should have a near perfect alignment and hopefully not need a replaceable breach. Mood: camracer 23:12:55 Thu Dec 16 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Quote: Tbkahuna at 17:06:27 Thu Dec 16 2010 I'll see if I can get around to building one. I think my idea and concept pre-dated all the other ones back in the early days. Does seem like a long time ago... Uuhhhhh...HUH, HUH!....OLD PEOPLE! ....HUH, HUH!...., or something! ---ButtHead. Mood: Mood Now: ( Rocking ) Tbkahuna 17:06:27 Thu Dec 16 2010 Offline 1671 posts BBMG MASTER BLASTER +1000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper I'll see if I can get around to building one. I think my idea and concept pre-dated all the other ones back in the early days. Does seem like a long time ago... Mood: camracer 14:37:35 Thu Dec 16 2010 Offline 4934 posts BBMG LIFE BLASTER +2000 Reply Re: Are we pushing the limits too high? Interact Reply Quote Report To Mod Last Posts Ignore User Global Ignore Whisper Yeah, TBK. It does have merit! We should try ALL options. Eventually one will shine the brightest! I had other questions but DnC brought them up first. I am thinking that some sort of replaceable breech and partial barrel may be the way to go, as per JimC. That way everyone does not have to do too much, or ANY modding to make it work. But on the other hand, ...you know me, I don't mind grinding and drilling! ---Cam Quote: Tbkahuna at 16:28:37 Wed Dec 15 2010 DnC tore up the hardened barrel and got it stuck in the barrel nut. FWIW, I still think there needs to be more material at the breech and that can only be done with a makeover. BTW I finally got the stainless and the tool I needed to make a mockup. I'll have to get started on that if anyone thinks that still has merit. 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