milo-2
Well-Known Member
If all this is on new brass, brass may be undersized and growing in length more than normal, this would cause the case head to slam into the bolt face, and ultimately ejector marks and false pressure indicators.So I finally got around to shooting this rifle. The marks on the bullet are gone however I'm still getting major ejector swipe regardless of load. From 39 to 42.5 gr (h4350) in half grain increments. Velocities from 2603 to 2817 (increased linearly). The swipe looked the same on the 39 load as it did on the 42.5. Gunwerks (ADG) brass. Can't figure this out. No other real pressure signs. Help!
So if it is, see if fired brass chambers, if it does, try getting some neck tension on a handful of cases w/o any marks and re-fire them. Let us know what they look like.
I despise primer cratering, but gave up using it as a pressure sign yrs ago, especially on new brass.