Guess I need a new mag

drache

drache

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As some might remember the first time I took my handgun out my last shot of the day was like this:

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Well today I got two more, both from the very last shot of the same magazine. The other mag works fine without problems. I swear I look at them at they are both the EXACT SAME on the tops, nothing seems out of place.

So I guess it's time to buy a new mag :D
 
TDC said:
Why would the magazine cause such damage? I suspect the round fed and fired as per normal?

TDC
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I think (guessing) the magazine is holding onto or pinching the round so it slows down the ejection which causes the slide to slam back and catch the casing. But yeah really I have no idea. You're right though it doesn't make sense... but... it does it always with the last round of the same mag. When I use the other mag I have no problems.
 
Pics of both mags' feed lips and frontal area, please.

Also, pull the baseplates off and see if someone's monkeyed with the springs.

-M
 
Doc M said:
Pics of both mags' feed lips and frontal area, please.

Also, pull the baseplates off and see if someone's monkeyed with the springs.

-M
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Sorry for the crappy pics... the one on the right is the one that works fine, the left one is the one Im having problems with.

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Ok now that Im off the firing line I can actually see a slight different in the mags, specifically the way the "plunger" sits.

Viper26 said:
What kind of gun?
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Norinco 1911A1
 
drache said:
Ok now that Im off the firing line I can actually see a slight different in the mags, specifically the way the "plunger" sits.


Norinco 1911A1
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Yup, there you go...

When you say "on the right" do you mean picture right (viewer left) or viewer right (picture left)?

The follower angles are most definitely different, as are the feed lips - the curve on what would be the "front right" of the mag when inserted into the gun has a big difference in curvature.

My suggestion is to take a pair of needle-nose pliers, wrap masking or electrical tape around the jaws (to prevent marring the mag) and make some adjustments until the "unreliable" mag looks EXACTLY like the "reliable" mag.

-M
 
You say it's always on the last round. Is the slide not locking back?

If the mag follower is too low to pick up the slide stop, the slide will go forward on an empty chamber. Without a round to pick up, the slide moves forward quite a bit faster. Possibly fast enough to close before the empty is all the way clear. Just a thought...

If that's the case, you're original fix is correct - get rid of that mag.
 
I was going to hunch that it's due to "light" loads... the slide isn't going far enough back to "eject" the brass properly and as a result the brass is getting hammered when the slide returns home.

Am I correct in assuming the slide is not locking open after the last round?

The reason all rounds before are ejecting "ok" is because the next rounds in the mag are aiding the ejection process by having a large cartridge there to push up against the spent brass.

All speculation of course. :)

What are you shooting btw?? reloads?
 
Doc M said:
Yup, there you go...

When you say "on the right" do you mean picture right (viewer left) or viewer right (picture left)?
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The right side of your monitor? :D

How would I go about changing the angle of the feeder?

Viper26 said:
You say it's always on the last round. Is the slide not locking back?
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The slide is jammed open

G37 said:
I was going to hunch that it's due to "light" loads... the slide isn't going far enough back to "eject" the brass properly and as a result the brass is getting hammered when the slide returns home.

Am I correct in assuming the slide is not locking open after the last round?

The reason all rounds before are ejecting "ok" is because the next rouns in the mag is aiding the ejection process by having a large cartridge there to push up againts the spent brass.

All speculation of course. :)

What are you shooting btw??
Click to expand...

I thought the same except ONE mag works fine, the other mag causes the problems on the very last shot. So if it was simply light loads then wouldn't it cause the same problem no matter the mag?

As for ammo I was shooting Fiocchi 230gr and then when I ran out of the I switched to Remington UMC 185gr. The round pictured in my OP was the Fiocchi from a week or two ago.
 
http://how-i-did-it.org/magazines/feeding-time.html

This may be a good read for you, if you want to tune up your mags ^^^.

If you open up the "front right" of the bad mag, such that the follower angle comes up to a proper angle - like the good mag, monitor right - I'll bet it will solve a lot of your problems.

Especially if, as others have noticed, the slide isn't locking back. It could be that the slide (which closes faster on the empty mag if it doesn't lock the slide back) is just closing fast enough that the last fired casing hasn't cleared the action.\

It definitely looks to me like the top of the bad mag has been "pinched" - maybe it was dropped the wrong way a few times? Stepped on?

-M
 
The little lower lip on the bad mag seems to catch on the mag as I try to push it down. The bad mag doesn't seem to have as rounded front as the good mag and not to mention that lower lip seems to have a slight bur that sometimes stops the feed from moving down.

Thanks Doc! I'll tinker with it and take it back out ASAP. :D

I love these forums!

P.S. These are stock Norinco mags so I certainly don't expect them to be perfect :p
 
Trouble shooting suggestion:

Load 1 round only at a time and shoot lots in this manner (with all your available mags)... get some data to confirm it is mag related and not coincidence.
Post results :)
 
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