I am using new Hornady brass and after firing it once, there are lots of scratches and marks on the brass from neck to the rim. There are lines running along side of brass for the entire length of the brass. Rim and bolt face side of brass both have significant marks. My gun is gassed properly, I am using adjustable gas block and the brass is ejected at 3.30-4 o'clock. I have attached pics of the brass, can someone tell me if this is normal for brass used in 308 AR-10 and if not, what I need to do to reduce marks on the brass?
AR-10 is chewing up my brass
- Thread starter dzz
- Start date
just because it throws the brass at 3-4 does not mean it is gassed properly. Turn down the gass and get a heavier buffer. But you may not be able to make the brass look better. AR10's are hard on brass
Is this happening to the next round in the magazine as the bolt strips the cartridge above, to the round being chambered as it feeds, or to the empty case as it ejects?
Have you tried a different magazine brand?
How does the feed ramp and chamber look? Polished? Sharp edges?
Tell us about the build and share pictures.
Have you tried a different magazine brand?
How does the feed ramp and chamber look? Polished? Sharp edges?
Tell us about the build and share pictures.
With the case lip nick and the linear gouge more or less clocking the same - I would speculate that there’s something off with the way / angle cases are being fed, and that there’s some interference from the barrel extension as it’s being slid in (sharp lugs?).
