If you have some N150, Varget, or RL15, start at 44.5 grains and work up cautiously to 47.0, using Federal GM210M or CCI BR2 primers. If you change from Lapua to a heavier brass, like Remington or military, you must start lower and cannot go that high. 2.850" COAL, because the bullet is a bit more sleek. Sweet spots should be around
45.0 to 46.2 gr Varget
45.0 to 46.2 gr RL-15
44.0 to 45.0 gr IMR 4064
43.5 to 44.7 gr N150
Velocities for all will be above 2,950 fps for 26 inch barrels at the upper charges.