Recent discovery in the 243 with Lapua brass, 100g Hornady btsp was with R#26, cci 250 at 3175 fps, small groups. We usually shoot this bullet with IMR 4350 at 3000 fps in Rem brass.
Keith, I shoot the 100g Hornady BTSP also with IMR 4350 out of a M70 with a 22" barell. What gun/barrel length you shooting...sounds like a 24"?
