02-10-2021, 03:39 AM
LR1955 Wrote:SH:
I don't think it was the bullets. I think it had something to do with using 7.62 X 39 brass. I too used Fed 210M primers in my fireformed brass and didn't notice anything weird for the most part but then I would get exceptions of blown primers and high pressures. One thing is that I always got donuts to various degrees when I fireformed 7.62 X 39 brass into Grendel. Some were pretty severe and others not so much but most of the brass had them. I started to internal ream the brass after fireforming and the first shot. What a PITA. No -- I don't think it was the bullets you are using. I got a feeling it has something to do with the brass and large primer.
LR55
I always use an expander ball. Got in the habit of doing so when necking Hornady 6.5G brass down to 6mm magnified the inconsistency of it's neck thickness.
Load had a 4 shot sd of 8 during development and a 10 shot sd of 12 during confirmation, so the powder / primer combo is consistent.
I think I'm going to load some 123 Scenars holding everything else the same when it's back up and running. I'm interested to see the velocity since 27.2 gr XBR with a 205M in a Lapua case gave me 2510.
Let's go Brandon!