Annular rings on fired brass?

January 04, 2023 00:39

I shot some reloads in my S&W 1006 yesterday. When I picked up the brass, it had these rings. I couldn't feel them, they're not deep.

What's more odd is they disappeared after running the through the sizing die.

These are A-USA cases.

Could the chamber be the issue?

Comments

4 comments

navc130

January 04, 2023 01:01
You are correct. The fired case is a reverse imprint of the chamber. It doesn't hurt the case and the marks appear very minor. You could carefully polish the chamber a little to eliminate them (hopefully). Good luck.
0
Ricci.Wright

January 04, 2023 15:09
If you carefully count the rings, you can determine how old the brass is.
27
bpost

January 04, 2023 15:24
When you smack brass with 20-50,000 PSI it will form to the steel tube it is shot in. As indicated those marks are normal and really not worth the effort to polish out because the brass relaxes after the shot and they are not causing extraction issues.
0
Butchdog2

January 04, 2023 22:38
14 years?
3

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