Data I've collected w/ 156 bergers and a verity of powders, CCI250, adg brass. 26" bartlein 8tw, Tikka action.
Brass required turning for proper clearance. Process is: cleaned, annealed, sized w/ 287 bushing, expanded with 262 mandrel tumbled. Gives 2.5k nk tension.
I don't run the psi a lot of guys do with the Sherman cases. I get ejector I can catch with the edge my knife, I typically shut it down, whether bolt lift is there or not. Some times lift/prominent ejector show up at same time.
My buddy and I built rifles at the same time, 90% same components. Barrels are both equally slow compared to said/advertised velocities.
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