> I am loading 223 cal. for a remington xp-100 from the custom shop also for one from the factory and last for a remington 600. I need to know what the twist rate is in each one. I am loading 55 gr. sierra spt. over 25.
5gr varget powder. The primer is remington 7 1/2. Also is this load OK for all three guns. The 600 has an 18 inch barrel the xp-100s are 14 inches. ...