Doing some load dev for a friends rifle, 80s Rem700. All I have powder wise that seems feazable is BLC2, 52gr Hornady BTHp and Speer BTHP. Never worked with a 222 before, I'm going off Hornady book max for now which has been conservative imo with other calibers. I know BLC2 is temp sensitive but going into winter I'm not too worried.