Just dialed in the 300wsm.....
Tight as I could get is .75 inch groups at 100yds.
180gr Nosler Accubonds, 65.6 grains of H4831sc, CCI 250 primers
Muzzle velocity....2726fps / chrono (not the hottest, but the best groups)
1600+ ft lbs of energy at 500 yds
PB