I don't even know how many deer I have killed with that gun. I bought it new in the early 80s. Don't load that load on the target without a work up. It is safe in that gun and was formerly published data but has been removed from manuals. I backed off to 21.5grs H110/296 lit by a 155 primer.This is with the 300gr XTP. The XTP mag is more accurate but the old XTP performs better on game. The mag doesn't always open at Ruger level velocities. Hope that helps.