What jmd025 posted--which is essentially what I posted before in response to your questions You're still not anywhere near the best operating pressure for Big Game, and that still means a SAFE operating pressure. That's indicated by the velocities you're getting.
One of the problems involved with century+ rounds is throat length varies considerably, which affects pressure (and hence velocity) considerably.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
