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Posted: 1/2/2011 1:39:08 PM EDT
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I have a new Noveske Afghan 14.5 middy. It has less than 400 rounds through and suddenly it starts failing to feed.
The round is stripped out of the mag and appears to overshoot the feed ramp. The cartridge base is even with where the lugs meet the bolt on the bottom of the bolt. The cartridge is gouged. I looked over the entire weapon and found burned gas residue on the bbl forward of the gas block. I immediately suspected gas leakage between the gas block and bbl. I sprayed a few drops of CLP on the front of the block to see if it was leaking, it is. The pic shows what happened. Is this my problem? Any help would be appreciated. 
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Single round in a mag, load and fire such, and see if the bolt locks back with the catch in front of the bolt face.
If no, then I would suspect the gas block leaking, and the set screws need to be tightened up. When you tighten the allen set screws, red loctite, and don't forget to double check not only the gas block passage to barrel gas port, but the key to gas tube as well. |
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Go through the gas system to insure that the key bolts are still tight, the gas rings will hold the bolt in the carrier when the cam is removed and the bolt face pointed straight down, there is not a blow primer piece in the key channel, and double clean the chamber with a chamber brush by hand to make sure that it it really clean.
Barring that and the rifle is full stroking (bolt does lock back) then suspect the mags, with pulling them apart to CLP clean them. Lastly, you did not mention ammo type, and if you have changed the rifle diet, then go back to the old ammo type to weed out if this is happening due to the ammo alone. The ammo that you have changed to may in deed be good, just that the rifle was not set up to run such, such in the case of over function with say a heaver than normal round using slower burning powder, which may in fact create more action gas pressure, with the action opening up too soon while the spent case is too pressure bound to the chamber walls to be pulled cleanly, resulting in a great loss of action momentum to full stroke the action. |
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If the catch was on the face of the bolt, and not just catching the bottom of the carrier, then the rifle is full stroking, and it all comes back to the mags.
Again, pull them apart and CLP Clean them. And yes, even more so if brand new. To add, when you where having the problems, where you using the mag as a forehand gripping point, hence canting the mag in the well causing a bad angle of attack for the round into the chamber?? |
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