02-12-2019, 04:12 AM
(This post was last modified: 02-12-2019, 04:15 AM by AR15gunner.)
caleb90 Wrote:just finished my ar build in 6.5 grendel. this is my first build and first ar15. i ran a box of hornady black eld through it just to test. after getting it sighted in i was getting groups the size of a nickle from 100 yards. but i noticed my case shoulders were getting scratched deeply and i had brass on the bolt face? being new to ar's what causes this?
Do they look like these? [ATTACH=CONFIG]13657[/ATTACH] If so mine had a bad chamber and it was replaced by the manufacturer.