Burn marks

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10-29-2018, 07:42 AM
Tommitch

Burn marks

Question...what could be causing the burn/carbon on the cases like that? They are 38 spl shooting 125gn plated over 4.4 titegrouphttps://uploads.tapatalk-cdn.com/201...dcbb43ab8e.jpg

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10-29-2018, 07:58 AM
Rrdswigert

Perhaps not a tight enough crimp on them. I know my 45Colt would do it if my crimp was not tight enough

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10-29-2018, 08:00 AM
CodySPowell

Quote:

Originally Posted by Tommitch

Question...what could be causing the burn/carbon on the cases like that? They are 38 spl shooting 125gn plated over 4.4 titegrouphttps://uploads.tapatalk-cdn.com/201...dcbb43ab8e.jpg

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That's pretty typical with lighter loads. All my light pistols loads do that.

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10-29-2018, 08:00 AM
Tommitch

That was a thought. I remeber seeing a post once with a simular problem and that was one of the answers

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10-29-2018, 08:02 AM
CodySPowell

Quote:

Originally Posted by Tommitch

That was a thought. I remeber seeing a post once with a simular problem and that was one of the answers

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Yup, had I not just tumbled all my pistol brass I'd be able to show the difference between a light load and heavy. Especially with 9mm and .38/.357

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10-29-2018, 08:03 AM
Tommitch

My 158's in 357 dont do that and im using the same powder but obviously a different weight

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10-29-2018, 08:05 AM
CodySPowell

Quote:

Originally Posted by Tommitch

My 158's in 357 dont do that and im using the same powder but obviously a different weight

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Exactly. I push the 158gr XTP's real hard. The 125gr stuff is light target and some magnum loads for fun.

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10-29-2018, 08:08 AM
Tommitch

It was just really noticeable on the 38 and not the 357...only reason it caught my attention that much

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10-29-2018, 01:31 PM
Jay Andrew

Light loads, the brass isn’t sealing against the chamber walls and allowing the gas to get between the brass case and the chamber.

Reloading...it’s like knitting for men.
10-29-2018, 02:21 PM
Cowcatcher

I'd say if you tighten the crimp up you'll clean em up.

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10-29-2018, 04:42 PM
BMiracleTX

Completely normal with lower pressure loads.
10-29-2018, 07:18 PM
ReneeMicelli

Quote:

Originally Posted by CodySPowell

That's pretty typical with lighter loads. All my light pistols loads do that.

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I agree 100%. Lighter loads do not build enough pressure to 'seal' the chamber fast enough to prevent blowback from coloring the case. All of my competition loads do this. I run them at the lower limits of making power factor and this is one of the side effects. It is not a bad thing as long as you are not getting squibs. Just something to deal with.