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Old December 15th, 2021, 12:26 AM #1
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Defective Brass

On the very first stage of last Sunday's C&R 2 gun match at AGC, Katie's M1 carbine jammed closed on about the third round. She couldn't force it open, so after a few wasted seconds, she safely abandoned it in the dump box and, took a bunch of FTE's and went to work with her pistol. When it was time to clear the rifle, I snatched the bolt open and was rewarded with a (much larger and more widespread than expected) shower of unburned powder. I took it over to the safe table and tapped out the bullet that was just barely held by the rifling. Fortunately, I had taken a pretty good mental picture of where the offending casing went and was able to find it. In addition to the fact that there were not many pieces of .30 carbine brass laying around, it was pretty obvious which one was the culprit:

Name:  bad 30 carb case.jpg
Views: 232
Size:  144.5 KB

Name:  bad 30carb primer.jpg
Views: 231
Size:  102.1 KB

These were factory (Arsmscor) rounds that the rifle had previously really liked, in both reliability and accuracy?

What happened?



There is another pic that clearly illustrates the problem. It would be fun to take guesses and build suspense and tease every one (because it's something I've never seen and never would have guessed). I'll put that pic as the first comment, so you can speculate without seeing the punchline:
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Old December 15th, 2021, 12:28 AM #2
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Did you guess yet?



No peeking...unless you want to...












Something is missing here:

Name:  bad 30 carb looking in.jpg
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Size:  105.5 KB




Name:  bad 30 carb mouth close up.jpg
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Size:  103.5 KB
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Old December 15th, 2021, 12:34 AM #3
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No pathway from primer picket to interior of casing??? i.e. somebody forgot to drill a hole!!!

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Old December 15th, 2021, 03:24 AM #4
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I've been shooting and handloading for over forty years and have never saw anything like that. When new brass cases are made the flash hole is usually punched in. More higher priced brass like Lapau and Nosler drill the flash hole. I have had brass with off center flash holes but never missing the flash hole.
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Old December 15th, 2021, 05:48 AM #5
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Well, that's a first for me. I've seen plenty of undersized, oversized, and off center. But I've never once seen a missing flash hole.

You may want to consider making Armscor aware of this story. It could help them and other shooters both. Definitely include the lot number off the box if you have it. They may send you something to compensate for your time and trouble, and I hope they do. In any event, they ideally should know about it.

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Old December 15th, 2021, 07:15 AM #6
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Hell, I have been reloading since I was 10, in the early sixties, and have never seen anything like that. I would write to them, with a picture and ask for a box of ammo since Katie lost the match.
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Old December 15th, 2021, 08:11 AM #7
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I would expect an ammo manufacturer to be heavily vested in digital image inspection and I guess not armscore.
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Old December 15th, 2021, 08:13 AM #8
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Yep, no flash hole. Had that happen on the Glock 18, jammed that thing up pretty tight. We were shooting Silver Bear 9mm at the time.
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Old December 15th, 2021, 09:10 AM #9
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Still can't believe that happened, and of course that one found its way in at the match
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Old December 15th, 2021, 09:11 AM #10
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Quote:
Originally Posted by savageShooter View Post
I've been shooting and handloading for over forty years and have never saw anything like that. When new brass cases are made the flash hole is usually punched in. More higher priced brass like Lapau and Nosler drill the flash hole. I have had brass with off center flash holes but never missing the flash hole.
Yes, me too, over 50 years, that's a first. Maybe their flash hole punch broke. I wonder how many slipped by.
Cool picture, thanks.
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