Loaded up the 243 with 37.5,38,38.5, and 39 grs of 4007 ssc today with 95 gr NBT. At best 1.5 inch groups. Gun is a ruger M77 with 18 inch barrel. Do you think their is a better powder choice I should be trying? I was goin to try IMR 4895.
My 2011 Hodgdon annual manual list loads for 15" barrel pistols and with you 18" barrel these are the loads I would use. With 95 gr bullets it list a Max load of 42.0 grs H414 as the top velocity load of 2781 fps. A max load of 35.0 grs H4895 gave 2740 fps.
Keep in mind that H414 and WW 760 are the same powders. Just like H110 and WW 296 are the same.