Hi:
At the range this P.M firing a Model 1911 with the 8 round magazine that came with it.
With the slide locked back and 8 round magazine inserted, releasing slide the top cartridge will fail to chamber with bullet pointed downward.

With slide forward in battery, magazine inserted, slide pulled to rear and released the top round will chamber as normal.

I have disassembled the magazine, checked magazine spring and magazine body and have not noted any irregulars.

Opinions ?

Thanks,
Jimmy

Jimmy,

Trying to visualize this. In my mind's eye, it looks like the follower needs to be adjusted. It sounds like the slide release, when depressed, is pulling the follower down, which is lowering the top round low enough that the slide is not stripping the round from the magazine.

Ed

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Judge control not gun control!

But the follower is at the bottom of the stack in a loaded mag, well away from the slide stop. Perhaps the SS is acting on the top ctg?

Larry

Jimmy,
You did not say what ammo you were using. Many 1911's like 230 grain Hardball (FMJ) and will sometimes falter with HP or JFN bullets.

Larry, you are correct, I saw it wrong. I think that you are correct about the slide stop engaging the nose of the top bullet, thereby pushing all of the rounds down so that the slide won't strip the top round out of the magazine!

__________________
Judge control not gun control!

1911's can be finicky about magazines, especially the eight rounders.

Personally, I don't usually mess with the magazines and just replace the ones that give me issues.

I've had almost zero issues with the Wilson Combat magazines so I typically try to stick to those.

Probably the slide release step inside the mag touching the bullet and pulling it downward as described.

Try feeding a round from the pistol w/a locked back side by just pulling the slide back a bit to unlock it and let it fly forward.
That minimum movement of the slidestop to unlock the slide probably won't disturb the top round enough to cause the feeding issue.
There's no continuous & constant downward thumb pressure on the slidestop after the slide is released unlike when it's done manually.

You can also take a new round and carefully polish up the bullet or coat it with sharpe pen and load it into the mag.
Then go thru the cadence where it jams and carefully examine the bullet. You'll probably find a bite mark on the left side of the bullet from the slide stop.

Change ammo or carefully alter the slide stop 'foot' to clear the bullet but still catch the mag follower. It's a very close fit with some bullet shapes.