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December 4, 2011
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Stopped at the range today between rain showers and ran a few rounds through a PMHC 45ACP. Gun functioned fine and I managed reasonable accuracy with it after figuring out the POA/POI. The issue was that twice out of 100 rounds fired, the last round had a mutilated case mouth. Both times it was the last round in the mag. They ejected completely and the slide locked back both times just like all the other times but I had two badly deformed case mouths. I haven't had this happen with any other 1911's so not sure what the issue is. Looks like a case that got jammed in the slide, but the slide was locked open. I'll attach some pics.
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February 1, 2016
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That's odd does look like slide mark. New or reloads ? Was it in beginning or after warmed up ?
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December 4, 2011
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Reloads, and the issue occurred after the gun was warmed up, although as cold as it was and the light rain falling prevented it from ever getting 'hot'.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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February 1, 2016
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Being warm, maybe debris, or something slowing down action a little?? I figure you keep clean, but maybe a little deeper ?? 
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December 4, 2011
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Gun had just been field stripped, cleaned and lubed with FP-10 the day before. I don't think it was dirt. Maybe it was light load that didn't recoil as hard slowing the action? I'm not sure. It's not a big deal but since I reload, I don't like chewing up my brass.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
February 16, 2016
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That looks like a light load didn't pull the case back far enough to contact the ejector hard enough and the slide then pushed the case forward, jamming it partially raised up.
March 22, 2016
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seen this occurr in the past with 1911 guns,.combo of last round (gun is light), combined with low pressure loads, and allowing the shooting hand to move and absorb the recoil in a rotating manner, the muzzle flip takes over, and full ejection force is not transferred to the slide, and it slams home on the partially ejected case. commonly called a stovepipe ftf.
keeping a firm forward force when firing, especially one handed, and making sure your grip is high in the web to resist muzzle flip helps, but beefing the charge up a bit helps more.
also full length resize dies help in uniform case sizing.
February 16, 2016
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man of blues said
full ejection force is not transferred to the slide, and it slams home on the partially ejected case. commonly called a stovepipe ftf.
I believe you mean "failure to eject". The reason it only happened on the last round, is because the new round being fed into the chamber from the magazine "assists" the spent casing to eject, but when there are no more rounds in the magazine, the slide jams the last case against the frame at about a 45-degree angle.
March 22, 2016
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yes, you are correct, my fat fingers typing on the screen of my Nook tablet got the best of me, FTE, and also correct on the last round not being assisted by one below it. my bad.
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March 17, 2016
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My Sig 229 elite does that on 1 magazine only. That leads me to believe, at least in my case it has some thing to do with that particular mag. It is new so I suspect it is just hanging upm but on that mag it is like clock work, next to the last round. The other two mags work like butta!
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December 4, 2011
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I think you guys have this nailed, I'm betting the rounds are a little light on powder and the last round isn't getting a 'kick' from the mag so its slow exiting the chamber and the slide is catching it. I'm going to turn up the heat on my next run of ammo and see how that works.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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