I went on the Hogdon site and they show 45.5 grains to 47.5 grains with SIE175 MK bullets. I have shot several powders, Varget, BLC (2), H4895, and trying them all out for OCW. I'm disabled so only shoot bench most at 100 yds and steel to 2 and 300 yds. I have a Remington 700 true action, PTG bolt( bol t is not easy to work using knob).SHILEN #7 MEDIUM BBL 1/10 26IN. IN A Bell and Carlson medalist 6 stock. A couple questions : 1. Has anyone done a load development wi H cfe 223? 2. Why is the PTG BOLT SO HARD TO USE ? ( MY GUNSMITH said to just use the base of the bolt with my fingers. The bolt slides great but when I use the bolt knob it binds. I've manually worked it about 1,000 times, polished it by hand . The thing is it slides so easy with my fingers on the base? I'm not using it for hunting but I wouldn't want to depend on it for a second shot. Any suggestions?