I am using Large primer in Lapua brass, 155g palma, 155g TMK, 168g MK, 168g TMK, 170g Norma tip strike, and 175g TMK. All bullets shoot tiny groups opening up a bullet hole, Rem 700, MHV Krieger 10, 11, and 12 twists with short freebore chamber where the 168g MK BT shank sits right at the...