I have been shooting different bullet weights from 50 grain to 55 grain. Powder ranges from 34 to 38 grains of H-380 to 34 to 40 grain of IMR 4064.The groupings are so scattered with the different loads/bullet combinations. I did find a pet load for the 22-250 that being 36 grain of IMR 4064 with a 50 grain V-max 20 thousandths off the lands. Is the 1-12 twist better with say 65 t0 70 grain bullets? I am just wondering since the lighter grain bullets scatter so bad.