I bought some new Lapua brass about a month ago. Have any of you noticed and inconsistency's in the new run? Out of my first 100 I had 21 that won't chamber for their second loading. It's like the case heads are warped. I had noticed that lengths of the new brass varied from .001-.004. I also weighed the whole batch and of the 100 it seemed that about 75 were within about a .1-.2 of a grain but the rest were like 2-3 grains different (Lighter). I also noticed when priming that some of the primers slipped in easy while a few were hard to get in. These are 6.5 x .284 and the fire forming loads were stiff but not out of line. I also noticed that when shooting I could fire 1-8 shots with everything being fine and then the next couple would have ejector marks on the case head. Everything was exactly the same as far as powder weight ect. I was just curious if you think I have a bad batch. Worse part is I have 200 of them. These are shot in a custom XP 100. So out of the first 100 I have 50 that would be considered benchrest quality. Sure would appreciate your thoughts!
Quote: I also noticed when priming that some of the primers slipped in easy while a few were hard to get in. These are 6.5 x .284 and the fire forming loads were stiff but not out of line.
Was this on the initial loading or when they were loaded for the second firing? Sounds like the loads are too hot.
How is the bolt lift on the cases that had the ejector marks?
If you were getting ejector marks then the bolt should have been heavy. If that's not the case, then it sounds like you got a soft batch (and not the cookies!).
Wonder if they could have been over annealed before leaving the factory?
