Nothing wrong with sticking to FFF 777. I use it with 110 grains loose sometimes. In comparison to other FFF-FF rivals, 777 yields the least amount of added 777 pressures.... energy probably equal to an extra 5 grains of FF using under 90 grains -- energy probably equal to an extra 10 grains FF when using 90-120 grains.

I do not recommend 120 grains 777 FFF, but the rifle can handle it as well as three 50-gr. pellets. My favorite load right now is 105 gr. 777 with a 240-250 bullet.... 90 gr. with a 200 gr. bullet.