I'm looking for a powder for 223 40 gr v-max in a rather short barrel - only 20". Has anybody had any experience of the kind? I tried imr 3031, it groups under 1moa, but I think it's a bit slow for such a barrel. They say one can use imr 4227 or imr 4759 - but these are handgun powders, I fear the pressure will rise too fast. Any thoughts?


















































