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Old 04-04-2008, 07:51 PM   #1
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bulling brass

has anyone noticed the bulge at one side of the base of the brass for m/n military ammo after firing. is it normal?

Last edited by jack007; 04-04-2008 at 07:59 PM. Reason: typo
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Old 04-04-2008, 07:59 PM   #2
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Quote:       Originally Posted by jack007 View Post
has anyone noticeh the bulge at one side of the base of m/n military ammo after firing. is it normal?
Are you certain that your chamber is OK?
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Old 04-04-2008, 08:00 PM   #3
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Never noticed a bulge on anything but my gut.
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Old 04-04-2008, 08:06 PM   #4
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i have 2 91/30 & m44. The first was unissued , sold as a new rifle. The m44 was a refurb. They both do it.
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Old 04-04-2008, 08:31 PM   #5
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what kind of ammo?
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Old 04-04-2008, 08:54 PM   #6
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It has to be the ammo then!
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Old 04-04-2008, 08:59 PM   #7
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I own 3 M\N's and none of them do it. I would suggest making a witness mark on a few cartridges and loading them single-shot so they all index to the same spot and see exactly where the bulge is occurring. If the bulge always shows up in the same spot, I'd inspect the chamber very closely for anything out of the ordinary.
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Old 04-04-2008, 09:08 PM   #8
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That's a great idea TM! That is why we all like you so much!
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Old 04-04-2008, 09:21 PM   #9
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still wonder if its ammo !! What kinda surplus ??
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Old 04-04-2008, 09:45 PM   #10
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He's offline Marion, so I guess we'll have to wait and see. In the meantime, you're a boogerhead! LOL I've never been the first one to hijack a thread, now I can cross that off my list!
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Old 04-04-2008, 10:13 PM   #11
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the headstamp is 10/82 . I have used other ammo same result. maybe more of a swelling than a bulge. I have used 100 or so rounds
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Old 04-04-2008, 10:35 PM   #12
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Only with brass? Are you seeing this when the brass cools down?

I've never noticed this with either Milsurp brass (bulgarian) or reloadable brass (all kinds), and I reload quite a bit.
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Old 04-04-2008, 10:45 PM   #13
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if i shoot it and eject it . it's bulged . looks like it is where the ejecter fits in the reciver
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Old 04-04-2008, 10:52 PM   #14
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Quote:       Originally Posted by jack007 View Post
if i shoot it and eject it . it's bulged . looks like it is where the ejecter fits in the reciver
Interesting. In my humble experience, I've nver seen a rifle that was supposed to eject cases that were bulged. I've seen many damage cases, but they had chamber or headspace problems and were on the verge of DANGEROUS or crappy ammo, which might be dangerous.

I'd not fire another round through them until you get answers.
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Old 04-04-2008, 10:59 PM   #15
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think i will take the gun and some of the cases to the gunshop were i got them . I will see what they think. thanks to everyone for there advice

one thing i just noticed on the m9130. if you remove the bolt and look at the chamber were the ejector cutout is at. it is not flush with the rest of the chamber

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Old 04-05-2008, 05:59 AM   #16
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Quote:       Originally Posted by jack007 View Post
think i will take the gun and some of the cases to the gunshop were i got them . I will see what they think. thanks to everyone for there advice

one thing i just noticed on the m9130. if you remove the bolt and look at the chamber were the ejector cutout is at. it is not flush with the rest of the chamber
Yes, there is a space for the ejector to move through the radial motion of locking the bolt down. If that's about where your bulge is, then no worries, especially since brass will flex and form to the chamber; with no support you'll get a bulge.

Do as toolman said and put a mark with a Sharpie or something on the case, then insert it with the mark in a known position (I hear 'up' is popular these days) and then see if that bulge matches up with the area where the ejector passes through around the rim. If so, you're pretty much in the clear. As with any good experiment, you will need at least three tests of this to reduce the error and the "confidence interval"... which I won't get into, as I learn about it in my 400-level chemistry courses.
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Old 04-05-2008, 09:00 AM   #17
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Quote:       Originally Posted by SwedeSteve View Post
He's offline Marion, so I guess we'll have to wait and see. In the meantime, you're a boogerhead! LOL I've never been the first one to hijack a thread, now I can cross that off my list!
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Old 04-05-2008, 09:24 AM   #18
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Quote:       Originally Posted by SwedeSteve View Post
He's offline Marion, so I guess we'll have to wait and see. In the meantime, you're a boogerhead! LOL I've never been the first one to hijack a thread, now I can cross that off my list!
Ya, Swede, your highjack didn't work very well. Some of us got it and so of us don't. They just tell me I am full of it!
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Old 04-05-2008, 09:26 AM   #19
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i like going to the beach and eating pie......
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Old 04-05-2008, 09:42 AM   #20
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Ooooooooooooo, I could ask what kind of pie but....does it involve a red face or a trip to the dentist?
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