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Posted: 4/6/2013 1:45:54 PM EDT
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So went to the range and at first it was doing fine... however after 60-100 rounds it started not feeding properly... The bullet would be half way cocked at a weird angle and not feed right, I would pull back on the charging handle a few times to get it to seat properly but then it wouldn't fire. I would again pull charging handle but wouldn't extract fully, half would still be stuck in barrel... I would have to use a knife or something to dig it out and upon inspection there was no indentations on the bullet where the firing pin would have hit. This happened maybe a dozen times! I came home to strip and clean the weapon, but then when I was cycling ammo through it manually (just with charging handle) it kept doing the fail to feed properly.
It did this with both the original mag and an aftermarket magazine I picked up, however they both worked prior to this incident happening. Any suggestions on what I should do or try to look for? I've already emailed ATI and Chiappa, but I figured maybe some of you guys have had issues and managed to fix them. |
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You'll have better luck in this sub forum.
http://www.ar15.com/forums/f_3/15_Rimfire_and_Pistol_Calibers.html |
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After doing some research and stripping my upper, I believe I have found the problem
http://i86.photobucket.com/albums/k101/Twistid_bucket/ea798578-ad5f-4bbb-b1d0-0c9158462fd6_zps17d7687f.jpg http://i86.photobucket.com/albums/k101/Twistid_bucket/f48ae5e8-56c5-4b1b-b3c1-6d9c6079731d_zps611b6657.jpg If you look on the top side it looks like theres a tiny indentation that may be causing the bullets to hang on it preventing extraction. http://zombiehunters.org/forum/viewtopic.php?f=16&t=65531 The person on this forum had the same exact issue .... Everything functioned fine up until the 200th round or so; the ammo was not ejecting. I stripped her down and found that the firing pin was striking the chamber, deforming the top of it and causing the brass to stick (see pic below). I'd have to work on it that night if I was going to shoot Sunday…
http://i269.photobucket.com/albums/jj61/InfernoGmbH/Gun%20stuff/Chamberdamage.jpg Saturday evening saw me cleaning the upper and using a diamond bit to Dremel the deformity on the chamber: http://i269.photobucket.com/albums/jj61/InfernoGmbH/Gun%20stuff/Chamberrepair.jpg So do you guys think its safe for me to try to smooth out the deformity and possibly the feed ramp ? |
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From what I see in the picture it would look as if this firearm has been "dry fired"...something one should never do with any .22 firearm. (Well, Ruger makes their firing pins with a stop that is suppose to prevent this but I don't dry fire them anyway.)
Since it is a rim fire the firing pin contacts the edge of the case. If there is no case in the chamber many .22 firearms will just allow the firing pin to move forward enough to contact the face of the barrel resulting in the indentation you have. Of course the result of this is...it doesn't want to feed. From the description it sounds like this happened while firing the weapon. If so, look at the casings that were firing. Where they cut all the way though from the firing pin? If so, then the firing pin is really protruding too far out and needs to be shortened. This is a critical operation as if it is made too short then the rifle will not fire at all. Time to contact ATI. Good luck with it. |
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Quoted:
From what I see in the picture it would look as if this firearm has been "dry fired"...something one should never do with any .22 firearm. (Well, Ruger makes their firing pins with a stop that is suppose to prevent this but I don't dry fire them anyway.) Since it is a rim fire the firing pin contacts the edge of the case. If there is no case in the chamber many .22 firearms will just allow the firing pin to move forward enough to contact the face of the barrel resulting in the indentation you have. Of course the result of this is...it doesn't want to feed. From the description it sounds like this happened while firing the weapon. If so, look at the casings that were firing. Where they cut all the way though from the firing pin? If so, then the firing pin is really protruding too far out and needs to be shortened. This is a critical operation as if it is made too short then the rifle will not fire at all. Time to contact ATI. Good luck with it. Thank you this was a very informative post. I have since filed down the indentation and smoothed it out with a small jewlers file. The bullets now freely fall into the chamber and when I mocked up the gun up (just stuck the barrel in the upper, no barrel lug), it was able to feed and extract freely. I went ahead and ordered a freefloat handguard system since the upper is completely dismantled anyways. Once everything is put back together I should be able to head to the range sometime this week hopefully. |
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Here is my repair job I did
http://i86.photobucket.com/albums/k101/Twistid_bucket/89406cec-610e-4444-9b3a-4e2927920dfb_zps736be9ba.jpg |
| You should be good-to-go. As long as the edges are smooth so they don't protrude into the barrel and hang up the cartridge as it goes in and out all is well. The little indentation on the face will not hurt anything..There are a lot of .22's out there working fine with these dents. (Don't dry fire .22's !) Glad you got it fixed, no need to send it back in for something small like this. Go enjoy that sucker... |
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