AR Sponsor
Posted: 8/19/2007 7:39:24 PM EDT
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Is there a common cause of a random fail to feed? I realize that this is broad, but the issue that I have seen is 1 round out every two hundred will fail to fully feed, and the brass will be dented just below the neck of the casing. The bullet is not gouged. Magazines are not the same, ammo is basic remington 55gr. Thanks for your thoughts! |
You sure about that? Best thing is to keep your mags numbered somehow. This way you can spot an early failure. As for "random fail to feed:" Could be a systemic problem, like a weak gas system. Most shots will fire OK, but the one bullet that is slightly sub par causes the failure. |
| This might be a bit of a bullshit answer but rifles will jam from time to time(any auto rifle). It could have been an underpowered round causing the system not to cycle properly or it could be the start of a mag failure. If it has only been twice I dont think it is the weapon itself. |
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The rifle has around 400 rounds through it and has done it twice. It is meticulously cleaned, so Im not thinking its that. The common denominator is the ammo, I am going to put 200 rounds through it with different ammo and see. My other thought is that if there were a systemic problem, it would show up more often. the latest was out of a nearly brand new mag. Keep the thoughts coming! |
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usual main culprit (besides not enough lube, dirt, broken parts, etc) are mag related feedlips, springs, etc could be messed up; mark your mags, make sure its not em if its ammo, it may be b/c its underpowered or it maybe that your gas tube is dirty (less likely) or that your gas is leaking out or short stroking (at random though?) this might help w/ some additional info also also, a thought from troubleshooter mod, mr dano: "First thing that you need to do is short stroke test the rifle, This test is done by loading a single round into the mag, load and charge the single round into the rifle from the mag, and fire it with the empty mag still in the rifle. If the rifle is full stroking, then the bolt will lock back on the blot catch after the short. If the rifle will not pass this test, they you will need to break the rifle down, fully clean/lube it correctly, and retest*. Also, if you are using wolf ammo, you will need to get a case of brass case ammo to break the rifle in before you may able to run the wolf ammo in the rifle. Bushmaster chambers their barrels on the tighter side, and the chamber will need to break in through live fire before you will have success with the coated ammo. Do this test, and get back to use with the results. *www.ar15.com/forums/topic.html?b=3&f=7&t=203988" +1 for mr DM1975's suggestion of trying diff ammo also |
 Most instructors I know teach to use the USGI 30 as a monopod with the AR-15.If you're rifle is having problems when 'monopoding' then I'd look at the following: 1) Magazine. 2) Tighten the magazine catch another turn (or two). Of course there could be a geometry issue in the lower (mag catch milled in the wrong spot, or some other milling problem) |
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