Read your manual for safe operation. Some people shoot that T7 load but many many ore shoot 100 or less grains. It seems some of these bullets perform better w/out the high load. Also the punishment you receive from that load IMO would not allow you to enjoy a long range session. I shoot 110 grain of BH209 oiut of my Pro Hunter, i have seen a couple guys state they shoot 120 but never more than taht. Again Many many giuys shoot 100 or less grains of BH209 and probably more are heading towards 90 grains. Go back through some of the posts and I am sure you will find charts outlining the speed factor and it is probably not worth loading 150 grains for the slight perforemance increas you will receive. The boys on this site I'm sure can give you better info.