brass cut's

[gene]

This is a new one for me, after fireing the brass has a small cut near the mouth of brass, extractor is fine. anyone have this problem or some help.
have a good day

[Hunter]

It sounds like the brass might be hitting the ejection port upon ejection and dinging the case mouth. Could be due to the extractor needing adjusting or you could lower the ejection port about 10 thousands but I would check extractor tension first.

[gene]

Thanks for the info. the extractor is puting the brass at 3-4 ft. no problem with it, i am thinking mabe sharp edge on frame that's cuting brass when it comes out, what do you think.

[Hunter]

It could be the edge of the ejection port dinging the brass. Is it a Springfield GI? You could put a radius on the edge of the bottom of the ejection port and that could smooth it out.

[John]

Does it do it with all cases, or just the last one in the mag?

[gene]

It's a kimber and it's not dings just a small cut looks like you cut them with a knife, all fired brass has the cut near the mouth.

[gene]

UPDATE on brass cut's
polish the chamber ON the kimber grand raptor fired 75 rds no more cut's on brass, easy fix if anyone has that problem.

[LeeCreekKid]

What did you use to polish the chamber?

[gene]

Started out with a wilson's chamber brush/hopper's or any good barrel cleaner.
next use a dremel with a round cotton/fiber pad with jewelers rouge, the pad came with the drill kit pad fits in snug run a little time, run for short time clean again, i use bore bright the last cleaning, looks great and shines.
hope it work's for you, the pad does no harm to the chamber.

[LeeCreekKid]

Thanks for the info.