Grayrock
Member
I have been loading 250gr LRNFP bullets in .45 Colt. I just bought some more bullets, but they only had 240gr in the style I wanted ( they made me a deal I could not pass up.) How much difference can I expect if I just use the same load and substitute a bullet only 10 grains lighter? I was getting 1200fps out of the 250 grains. OH yeah- old 250gr say they are .454 diameter and new 240gr claim .452 diameter. How will that factor in?