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Old 07-27-2010, 09:20 PM
brent701 brent701 is offline
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Default stovepipe jam.. what does it mean?

I am seeing a lot of people post about this the last week or so.

what does it mean? I know it's a type of jam but how?

thanks
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Old 07-27-2010, 09:48 PM
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It is when the empty casing fails to clear and jams the action open with the case perpendicular to the bore axis, usually with the case mouth outward. In guns that have an ejection port that is open to the top of the gun (think 1911 or M9), the empty facing upward looks like...a stove pipe.
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Old 07-27-2010, 09:51 PM
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A stovepipe is technically an empty case sticking out of the ejection port. Is this what your stoppage looks like?

This is a Failure to Eject. First suspect is the extractor. Dirt and crud will keep it from holding the case to the bolt face until the case strikes the ejector.

Ejector is the second suspect. Early M&P15-22 rifles had theirs slightly out of place. Good photo essays regarding the simple fix. Probably a video too.

If you have a live round sticking out it a Failure to Feed and is magazine related. Could be loading error. Could be too many rounds in the magazine. They won't hold 25 unless the rounds stagger. Part of proper loading the magazine is checking for stagger. If the 25th round is hard to insert leave it out and just shoot 24.

Staggered vs. not-Staggered:



-- Chuck
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Old 07-27-2010, 10:42 PM
brent701 brent701 is offline
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Ah, thanks

I am having a problem with them loading into the chamber. the round goes about 1/2-3/4 the way in than gets stuck for some reason. I have to take the mag out clear the chamber and it normally is ready to go when i put the mag back in. It's weird
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Old 07-27-2010, 11:49 PM
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Originally Posted by brent701 View Post
Ah, thanks

I am having a problem with them loading into the chamber. the round goes about 1/2-3/4 the way in than gets stuck for some reason. I have to take the mag out clear the chamber and it normally is ready to go when i put the mag back in. It's weird
I'd make sure the chamber and the ramp are sufficiently clean. Another thing people do to help with this is give the ramp a little but of a polishing to make it more "slick". Just be very careful with your tools so you dont ding the edges of the chamber wall.

A question I have is do any of you put oil on the ramp?
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Old 07-28-2010, 12:11 PM
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Originally Posted by Scuds03 View Post
I'd make sure the chamber and the ramp are sufficiently clean. Another thing people do to help with this is give the ramp a little but of a polishing to make it more "slick". Just be very careful with your tools so you dont ding the edges of the chamber wall.

A question I have is do any of you put oil on the ramp?
My ramp got a quick "shine" with a dremel polishing wheel and a dab o' Mother's while I was shining up the trigger/hammer surfaces. When I'm done cleaning up the after shooting carbon with CLP I'll generally give all of the surfaces, including the ramp, a protective wipe with a bit of remoil (or similar) just to save it from the summer humidity and call it good until the next shooting session.
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