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Posted: 5/6/2008 6:54:14 AM EDT
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I have AR-15's. One is a Colt Y2K model and the other is a Bushmaster. Both of these rifles will not feed anything but ball ammo. If I load some hollow points or softpoints, when the rifle goes into battery it shoves the bullet back into the case. What is causing this?? I have about 6 magazines of all expirence (New and old) and all still do it. ANy thoughts. These are factory guns, not custom builds and the ammo is all factory, not reloads. |
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It occurs with Wolf, Federal American Eagle, Remington UMC, and some military stuff I had. My first thought was magazine but when it happened with two new ones also, I kinda eliminated that theory. I also thought maybe something had come loose and I have checked everything and it was tight. These guns are not new but far from being worn out. Maybe 1000 rounds through each gun, 2000 at most. |
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Some rifle just don't do well with HP ammo, but before you just give up, detail chamber brush clean the rigs and see if that helps. The coating used on wolf ammo will not be dissolved via copper solvents, meaning that it has to be scrubbed out. Why this matters is that if the chamber is left in a coated foul state, it causes the rifle to semi short stroke, which translates to the lack of a good rear blow of the buffer off the back of the tube to assist the mag in recovering. A cleaned, CLP lube rifle should solve the soft point problem, but wolf HP may be another story. |
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Still not sure what is causing it. I guess I will buy some more mags and try it. I cleaned the gun until I was tired of cleaning. I really have not shot much wolf in it. After cleaning it the guns still behaved the same. I lubed the crap out of them, so I guess the last thing to try is the mags, even though I have three new ones. |
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New mags can have burs on the bottom of the feed lips, so stoning off the burs may put you in the right step. Really, if the rifles are stroking correctly (read bolt locking back after the last round), then the mag should be recovering correctly (top round seating tight against the entire feed lip). Tight'g the mag catch another wind may hold the mags a tad better to keep them from front noise diving, but worst case with the HP rounds, it's either M-4 Feed ramps, or just inserting a piece of a folded up match book cover between the back of the mag and the mag well to give the mag/top round a more direct shot into the feed ramps (cants the front of the mag up). Also, don't forget to pull the mags down and clean then too, especially new ones from the start. Fouled/debris littered mags tend to not want to recover correctly, and they can cause a problem in it's self with low feeds. As for a mag that may work better with the HP rounds, the SA80's seat a tad bit higher in the rifles (top of feed lips), and even accept a mag feed lip tweak better if needed (to make the round feed higher out of the mag). |
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