9c magazine problem
- Thread starter Dtoccj116
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smokey0118
Member
Make sure you keep your wrists firm. Some of the steel cased ammo I've shot through my m&p9c isn't as hot as the brass cased stuff. It also doesn't have as much lubricity, so it doesn't slide out of the mag as easily. Polymer pistols are much more prone to malfunctions caused by limp-wristing because the frames don't give as much resistance(they're lighter) compared to steel framed guns. As the gun flips up and back, force that should be moving the slide to the rear is revectored into rotation/dispersed into the frame. It's likely that you're getting a more solid grip on the full-length magazine and not limp-wristing as much. It's also likely that the heavier 17 rnd magazine gives the frame some more weight and aids in function.
Shooting various forms of steel stuff through my M&P(tulammo, steel match, wolf...), it's eaten everything without a single malfunction yet with my 12 rnd magazines and my 17 round magazines alike.
I'd concentrate on this...
http://youtu.be/RgByPFHCpQE
I'd also look to see if the magazines have burrs on the feed lips anywhere. You don't want to really screw around with magazine feedlips unless you really know what you're doing and how each round is fed in to the gun in a very step-by-step kind of way, but polishing off a burr could solve your problem if one is present. I do suspect it's more likely a technique issue though.
Shooting various forms of steel stuff through my M&P(tulammo, steel match, wolf...), it's eaten everything without a single malfunction yet with my 12 rnd magazines and my 17 round magazines alike.
I'd concentrate on this...
http://youtu.be/RgByPFHCpQE
I'd also look to see if the magazines have burrs on the feed lips anywhere. You don't want to really screw around with magazine feedlips unless you really know what you're doing and how each round is fed in to the gun in a very step-by-step kind of way, but polishing off a burr could solve your problem if one is present. I do suspect it's more likely a technique issue though.
smokey0118
Member
Is it only malfunctioning when you're firing or does it malfunction when you drop the slide onto a loaded magazine? The slide should be coming nearly all the way to the rear while firing. If it chambers a round and goes fully in to battery when you drop a slide on a loaded mag, but malfunctions when shooting, it's likely a technique issue. If it malfunctions on both, it could be the magazine spring, recoil spring, or magazine lips...or even a burr on the underside of your extractor. If it's really a problem, you could just stick to shooting brass, or just stick to shooting with the 17 rnd mag.
A way to rule you out as the problem would be to give the gun to an experienced shooter with the 12 rnd mag and see if it still malfunctions for them. I know my M&P9c has been flawless with any mag and any factory ammo, steel cased or otherwise. The only issue I had with mine was the front sight walking out of the dovetail to the left when I shot and warmed up the gun. I had to stake it and fit it, then it was fine.
Check out this video on YouTube:
http://youtu.be/rr249hQfndU
This is the problem I am having
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http://youtu.be/rr249hQfndU
This is the problem I am having
Sent from my iPhone using Tapatalk
Jyezahn
US Veteran
Looks like you could stand to put just a hint of oil on the sides of the follower before you load the magazine. Normally, I don't recommend lubricating the magazine, but in this case, a little might just prevent the issue.
smokey0118
Member
Oh, I learned that lesson in the middle of an IDPA match with my p99AS. Mid-stage, my follower stuck just like that and I lost some time clearing the malfunction and switching to a backup mag. It's because I went too long in-between cleaning it. Along with cleaning your firearm, regular post-range maintenance should include disassembling your magazines and cleaning the inside of the body and the follower.
Over time, carbon and other gunk builds up down around your follower and inside the magazine body and can cause those types of failures. Take the magazine apart and scrub down the outside to remove any buildup. While it's out, look for burrs on the follower and inside of the body near the weld line. Lubing the follower with oil is typically not the best thing to do because it will collect **** and eventually make a thick slurry that will gum stuff up. Passing a silicon rag through or even using some graphite around the follower can help without the negatives of oil.
As for why it happens with steel but not brass... steel cases often don't seal to the chamber as well as brass casings and will kick more **** back in to the chamber walls and the gun itself.
I had noticed once or twice when feeding my m&p mags, they don't always automatically stagger like they should. I make sure to consciously say "left, right, left right" as I'm feeding them to make sure the ammo staggers correctly. That could be something to try. My 17 rnd mag hung up like that once a while back and I noticed it got locked up when they didn't stagger correctly.
I dunno, hope this helps. If you're already regularly cleaning the follower and have tried the silicon cloth up inside the body and graphite on the follower, I'd ditch that mag as unreliable and pick up a new one. My 12 rnders have all functioned flawlessly through hundreds of rounds of steel stuff from tulammo to steel match to wolf.
Over time, carbon and other gunk builds up down around your follower and inside the magazine body and can cause those types of failures. Take the magazine apart and scrub down the outside to remove any buildup. While it's out, look for burrs on the follower and inside of the body near the weld line. Lubing the follower with oil is typically not the best thing to do because it will collect **** and eventually make a thick slurry that will gum stuff up. Passing a silicon rag through or even using some graphite around the follower can help without the negatives of oil.
As for why it happens with steel but not brass... steel cases often don't seal to the chamber as well as brass casings and will kick more **** back in to the chamber walls and the gun itself.
I had noticed once or twice when feeding my m&p mags, they don't always automatically stagger like they should. I make sure to consciously say "left, right, left right" as I'm feeding them to make sure the ammo staggers correctly. That could be something to try. My 17 rnd mag hung up like that once a while back and I noticed it got locked up when they didn't stagger correctly.
I dunno, hope this helps. If you're already regularly cleaning the follower and have tried the silicon cloth up inside the body and graphite on the follower, I'd ditch that mag as unreliable and pick up a new one. My 12 rnders have all functioned flawlessly through hundreds of rounds of steel stuff from tulammo to steel match to wolf.
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