[jonascord]

A point to consider: Check to see the condition of the primer in the fired case. A primer cup that has been subjected to an overpressure will look flattened and printed against the bolt face.

I realize that there is a shooter tendency that says "If some is good, a lot is better..." BUT! Start dialing back the powder load a grain at a time, load 20 rounds, shoot off a bench with a scope, measure the group for edge-to-edge dispersion, and watch your groups shrink.

Considering the range of possibilities that the Chicago Crook and his fellow thieves are promoting, a smaller group might well be a life saver.

[DuncanWaring]

I’ve already been through that, going the other direction; group size decreased with increasing powder charge.

The charge I’m using is just under what the guys at the powder manufacturer recommended as the max safe load.

And the primers do indeed say “You’re right at the limit”.

But, it gets a 190 grain MatchKing up to roughly 2900 fps.