i recently bought a savage 110 in .223 it has a heavy varmint barrel on it and i cant find a straight answer on a twist rate for it, does any body know if it is a 1in10 or a 12? i bought it primarly for long range paper punching and would like to know what weight bullets to put through it, im currently using 55gr hornady fmj's up to 400yrds, but would like to go farther.