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Old 04-26-2012, 09:07 PM   #21
daveinvegas
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Recently, a customer brought a Colt Combat Commander to me for some work. One of the things he wanted done was to replace the barrel, which the customer provided.

The top of the feed ramp had been rounded over and then the barrel throat had been cut back which left little support for the cartridge.

I say, for the most part, Dremels and firearms shouldn’t come into contact with each other.

The use of a Dremel requires a delicate touch. Go here and you'll see what I mean: http://www.nevadashooters.com/showthread.php?t=11219

BTW, the customer was not the person who damaged the pistol.

Last edited by daveinvegas; 04-26-2012 at 09:32 PM.
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Old 04-29-2012, 12:01 AM   #22
daveinvegas
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Originally Posted by SundevilSG View Post
My wife was shooting my .45acp reloads out of her 1911 today when two rounds "locked up" the slide. Both times there was a normal report, normal recoil, bullet exited fine. The slide cycled (apparently), cocked the hammer, and then resulted in a dead trigger. The only way to clear it was to rack the slide VERY hard and eject the chambered case (not sure if it was a live round or an empty case as my wife handled it both times). Both times I field stripped the gun to make sure there was no obstruction in the bore, and everything looked normal on diss-assembly.

I am assuming they were live rounds ejected as the slide must have cycled to cock the hammer.

The rounds were on the lighter side and loaded to my normal 1.270" OAL. I've shot this same load hundreds of times from this gun.

At first I was thinking it was the case swelling, but that wouldnt explain the cocked hammer and dead trigger.

Anyone have any idea whats going on here? I'll go back in a few days with the same lot to try and duplicate the problem.

NyecoSteve,

These are the guns I enjoy working on.

I'd love to shoot this one along with the offending ammo before it gets sent back to the manufacturer.
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Old 04-29-2012, 12:23 AM   #23
NYECOGunsmith
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Originally Posted by daveinvegas View Post
NyecoSteve,

These are the guns I enjoy working on.

I'd love to shoot this one along with the offending ammo before it gets sent back to the manufacturer.
Dave, I am acquainted with SundevilSG and his missus, he doesn't miss much, neither does she. This one will be fun to figure out.

If he can duplicate it, I'll bet we get good, detailed info on what he sees or finds.
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Just because a complaint was never filed doesn't mean a defective parachute was never made.
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Old 04-29-2012, 07:31 PM   #24
SundevilSG
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I was able to duplicate the problem once more with that same batch of reloads. Each one chamber checked just fine

The gun will into battery, fired, and cycled fine. The offending round enter the chamber and AT THAT point the slide locked up. Both times the gun was relatively clean (100 or so rounds through it). I made sure that the gun was in full lockup and the slide was as far forward as normal.

When this occurred, the trigger was dead as if the safety had been engaged. Again, it took a hard jerk to the rear to operate the slide and expel the round. I loaded the same one again and it fired fine.

Do you suspect this might be a problem with one of the safeties? IE: Its partially engaging despite the thumb being ridden and the grip depressed? I havent done more than field strip the gun as I am still working on mastering the BHP, but I have an AGI video...
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Old 04-29-2012, 09:36 PM   #25
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Quote:
Originally Posted by SundevilSG View Post
I was able to duplicate the problem once more with that same batch of reloads. Each one chamber checked just fine

The gun will into battery, fired, and cycled fine. The offending round enter the chamber and AT THAT point the slide locked up. Both times the gun was relatively clean (100 or so rounds through it). I made sure that the gun was in full lockup and the slide was as far forward as normal.

When this occurred, the trigger was dead as if the safety had been engaged. Again, it took a hard jerk to the rear to operate the slide and expel the round. I loaded the same one again and it fired fine.

Do you suspect this might be a problem with one of the safeties? IE: Its partially engaging despite the thumb being ridden and the grip depressed? I havent done more than field strip the gun as I am still working on mastering the BHP, but I have an AGI video...
I'd like to see you duplicate the issue with factory ammo before pronouncing sentence, but if it does it with factory ammo, the safety is a possibility. Although it not going into full lockup, and being difficult to work the slide point more towards the ammunition at this point.
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Old 04-29-2012, 09:49 PM   #26
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The need to use a hard jerk to eject the round is the key here. Properly loaded ammo should just fly out w/o having to jerk on the slide.
If it took a hard jerk to extract the round, it is an ammo/chamber problem. Either the case mouth is slightly flared/bulged or the bullet is seated out a bit too far hitting the lands or possibly a few cases are a bit too long for the chamber. The last only likely in a tight short chambered match barrel. Either way the gun is not going 100% completely into battery and disengaging the disconnector. I would bet that if the next time the gun does this, you smack the back of the slide hard with the palm of your hand it would then fire "normally". By re-chambering the unfired round you are basically resizing it a smidge, allowing it to chamber a bit deeper, and letting the disconnector completely reset. If it does this with other ammo including factory you need to see a smith.
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Old 04-29-2012, 10:22 PM   #27
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I apologize if I missed this but . . .

What 1911 is this? Colt, RIA or ????

What powder charge for your reloads.

What type of bullet? FMJ, RNL, LSWC?

Have you made any modifications on the pistol?

I've seen this kind of thing before. I have a couple of ideas what the problem is but I would have to have the pistol in hand to be certain.

Last edited by daveinvegas; 04-29-2012 at 10:26 PM.
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Old 04-29-2012, 11:44 PM   #28
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Its an STI Spartan in .45ACP. The gun is bone stock and has never been more than field stripped.

The rounds were 230gr Rainer lead round nose. Mixed cases. Winchester standard load Small pistol primer. 5.0 grains W231. All were seated correctly and Lee crimped to around .469 (off the top of my head).

Perhaps I missed one during the chamber test after it happened the first time.

Thanks for the ideas fellas. I will dig into my factory stash for the next range trip and see what happens.

Something interesting to note - not sure if its related: the safety will move upwards enough with the hammer DOWN that it can prevent travel of the slide. Not fully up, but it will move 1/8" or so. Its done that since I got it and it hasnt caused issues (the hammer is only down when the trigger is pulled on my SAO pistols).
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Old 04-29-2012, 11:53 PM   #29
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I would send it to Armscor here in Pahrump and tell Arnel what your issues are.

He will go thru it and make it work.

Armscor pistols do have some issues from time to time. I would have guessed it was an RIA. Actually, that was my first geuss (<<<<typo). STI Spartan/RIA, same same.

Last edited by daveinvegas; 04-30-2012 at 12:02 AM.
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Old 05-02-2012, 01:31 AM   #30
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Fair enough, I'll give them a call. Thanks for the ideas!
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