What causes this feed problem .
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243winxb
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Reloads or factory ammo? Try some 230 gr factory ammo.
1.The bolt is not moving fully to the rear on firing. Maximum loading needed?
2. Slide timing. Adjust loading. More or less powder.
3. The magazine is slow on letting the head of the cartridge move up fast enough. The bolt skims over the round.
4. The extractor is not allowing the rim to slide under it easly. Need photo of bolt/extractor type.
5. The round pops out of the magazine before the bolt makes contact. (As you suggest)
6. Lube? New dry guns don't run.
1.The bolt is not moving fully to the rear on firing. Maximum loading needed?
2. Slide timing. Adjust loading. More or less powder.
3. The magazine is slow on letting the head of the cartridge move up fast enough. The bolt skims over the round.
4. The extractor is not allowing the rim to slide under it easly. Need photo of bolt/extractor type.
5. The round pops out of the magazine before the bolt makes contact. (As you suggest)
6. Lube? New dry guns don't run.
Blue68f100
Member
Every gun is different. New guns can be tight and need some brake-in, before reduced loads function properly. Gun looks dry in the photo, which could cause problems too. I'm with 243winxb, try some factory loads. Oil the gun good to assist in break-in. It's not a high end custom 1911 that has been hand fitted where the action is smooth as glass. If you've been hand loading for awhile, you should now that not all chambers are the same. Yes you can make a round that functions in them all, but you have to have all the guns present when you workup your loads. Adding one late to the party can bring up issues.
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m715
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I got to looking at the magazine..seems the slide is chewing on the top of the mag..or at least i think its the slide.this thing uses glock mags,i am not a glock user.all my weapons are on 1911 frame,except for this one..does a glock make slight contact with the upper part of the outer retainer that locks the next round in place..it seems to be flat spotting the top edge of the mag..this thing was flawless until about 100 rds threw the mag..i have 2 mags now both are failing to feed and both are chewed up a little on the top..i hope this makes since to someone.
RecoilRob
Member
Can you post pictures of the 'chewed up' mags? If they worked before getting 'chewed up', but now won't feed....then it's logical to assume that the 'chewing' has resulted in them failing. The bolt should not be making hard contact with the mag lips and might need a little massaging to prevent it doing damage. This is of course assuming that the mag is being held at the correct position for feeding which also might be part of the problem. If it's held too high the bolt will hit it so careful examination is needed to see what is causing what.
I had that failure with a 1911 and a bad magazine. The hole for the mag catch was cut too low in the magazine, causing it to ride high in the well. That caused the top of the mag to scrape the slide, slowing it down...and I believe it may also have been popping the nose of the cartridge up as the bolt face moved backwards across the rim...maybe. either way it kept jamming rounds as in your picture...new mag, no more problems
WestKentucky
Member
Strip and clean the magazine. Does the follower move freely in the housing?
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m715
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this is a new tnw 45 acp aero survival,the two mags are 26 rd sgm tactical..the mags are ,were new with the gun.the left side of the retaining lip is flatened out on the rear half.I think you can see it in the pics.as i said before .both mags worked great with the amo ,now after some use they seem to be banged up were the slide would cross over..I do not know if this is enough to affect the mag since I am not familier with glock..all i have are 1911 frame weapons.
243winxb
Member
To be clear, the mags came from the factory, with the new gun?
If the lips of the mags can be bent or modified to clear the bolt, i would give it a try with one magazine.
I'm not a Glock guy. Wondering if your rifle is designed for a single or double stack magazine?
If the mags came with the gun when new, i would contact the factory.
It certainly looks to me like that magazine will not work in that gun. Nothing should ever be touching the magazine's feed lips regardless of the ammo being used. Just because it is possible to shove a magazine into a magwell doesn't mean it "fits" or will work. Contact the manufacturer of the gun and send them that photo of the chewed up magazine.
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m715
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Called the gun manufacturer.was told they are having issues with the sgm mag that actually comes with the gun.they suggested trying a glock mag and that should fix fthe issue..now im worried what i have bought,how do you not know of a mag issue if you are sending this mag out with the gun new.
243winxb
Member
In 1979, had the same type problem. New Colt M16A1 carbine, with 2 - 20 round Colt marked magazines, that came with the gun. It didnt run till i adjusted the mags lips.
Colt made the gun. Another company made the mags, would be my guess?
Colt made the gun. Another company made the mags, would be my guess?
RecoilRob
Member
If the bolt is making hard contact with the magazine there's two options to consider: either the mag is too high or the bolt is not machined properly. There ARE differences in mags sometimes and another one might have the latch notch a little higher which will lower the feed lips relative to the bolt. That's something I'd check before going any farther....preferably with a factory Glock mag as that would be the highest probability to being in spec vs an aftermarket version. With factory Glock mag locked in place....slowly lower the bolt and see if it makes contact and if it does....there's something wrong with the gun, either the latch is too high or the bolt not machined correctly. Should be simple to see what's going on if you look carefully.
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