Dented brass

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Dented brass

Postby Cutright » Sun Mar 19, 2017 11:45 am

I was prepping some brass for reloading when I noticed a small mark on some of the cases. It is not on all of them and I was having no problems feeding. Any ideas what this might be and if it might cause future problems. [ [IMG]http://i68.tinypic.
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Re: Dented brass

Postby Cutright » Sun Mar 19, 2017 11:48 am

Image
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Re: Dented brass

Postby plant_one » Sun Mar 19, 2017 11:53 am

id be more worried about the claw marks on the case heads than those little dings. they'll fire form right back out.

it looks like you either have a nasty burr on your extractor, you're over gassed, or over pressure.

can we get some more details about your firearm & load recipe and see pictures of the top of the case heads? might help us out a bit.

info that may be helpful include (but is not necessarily limited to)
barrel make
gas system length
buffer weight/style (carbine, rifle, h2, etc)
bullet
powder & charge weight
how much crimp
OAL
primer
how many times those brass have been around the block
brand of BCG
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Re: Dented brass

Postby Al in Mi » Sun Mar 19, 2017 12:04 pm

looks like they are hitting the inside lugs of the barrel extension.
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Re: Dented brass

Postby Cutright » Sun Mar 19, 2017 12:55 pm

I am new to the AR and it has been happening from the start with all loads and factory loads, so I thought it was just part of the platform. It is a factory 16" Bushmaster with Hoots' CWS.
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Re: Dented brass

Postby Cutright » Sun Mar 19, 2017 1:25 pm

Here is once fired factory Image
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Re: Dented brass

Postby Cutright » Sun Mar 19, 2017 1:26 pm

Image
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Re: Dented brass

Postby Hoot » Sun Mar 19, 2017 3:22 pm

The claw marks are most peculiar. The rough handling in general should have been helped by the CCWS. I would agree with plant_one's assessment and questions about your lower. I've seen similar insults as a result of the rounds being too hard to strip from the mag. If you haven't already done so, consider reducing the amount of spring force in your mag.

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Re: Dented brass

Postby plant_one » Mon Mar 20, 2017 9:34 am

Cutright wrote:I am new to the AR and it has been happening from the start with all loads and factory loads, so I thought it was just part of the platform. It is a factory 16" Bushmaster with Hoots' CWS.





as i asked, can we please get a pic of the case head face - i'm thinking you could just have some nasty burs on your extractor claw or like the other folks said, maybe the lugs on the barrel extension - if its doing this with factory loads too, but i'll feel more comfortable making that diagnosis if we can see the flat end too
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Re: Dented brass

Postby Cutright » Mon Mar 20, 2017 2:55 pm

The case face doesn't show anything, but the marks in the case are the same width as the extractor, so I think you are correct. The upper has had maybe 150 rounds through it, and I have had VERY good accuracy, so I've been afraid to mess with it too much. Thanks for all the input, it is extremely helpful. Image
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