Primer test is all done I am sticking with the BR2 the groups dont lie.
I loaded up 24 rounds to do a seating depth test I shot four six round groups at 200 yards from the bench over a backpack.
The conditions where cold 27 degrees, wind was calm 1 mph at the shooter bright and sunny.
I shot fast no waiting between shots
CCI BR2 primer
I started .010 off the lands and the group was low I only hit the paper 3 times I dialed 5/10 of a mil up for the next groups
The group things got better at .050 off the lands
Then they opend a bit at .090 off the lands
And then even more at .130 off the lands