My 7mm rem mag, has been grouping fairly well (~.75-1") with 66.5 gr of RL 22 and 140 B/T's.
Coincidently my favorite 7mmremmag load was 67gr of r-22 behind a 140gr ballistic tip.You are probably quite close to the maximum load for that rifle,so most people would be quite content with those results if the gun repeats those groups consistantly.