I suggest shooting whatever load works out to be the most accurate. Each barrel & load combo will vary some, even in the same brand & cal of rifle. Most of the GPR's I have shot are shooting a target load of 60-70 grains. In mine I shoot 65 grains of FF Goex, .035 ball, .017 pillow ticking & BD6 patch grease. I bump it to 75 grains for deer hunting & it is quite adequate. :grin: