I'm hoping Whitworth weighs in as well. I run 325 Speer and 420 BTB in my Linbaugh. I run the 325 at 1400 and the 420 at 1200-1250 - all 480 Ruger vels. I've shot the 420's at 1400 and I didn't care for the increased recoil.

Adversity doesn't build character, it reveals it.