Update:
I had the Mauser from Hell back out to the range on Saturday. I put 20 rounds of the Hornady 170 grain RN through it. The wind was gusty, so it really played hell with the groups, but even with that handicap, I was keeping everything inside Minute-of-Deer accuracy. I'm going back and load 50 rounds of the ammo and run a few more through before season, but I think we can call this one fixed.
