Filling my WWSuper .260 cases to the hilt with BL-C2 powder yields 58.0grains. Filling my Lapua case yields 55.5grains. My pet load was 43.0gr H4350 in the WW cases. Any particular correlation between case capacity and amount of powder as far as how many grains to drop from my Lapua cases to get the same velocity as 43.0gr in the WWcases? I'll try several loads with the crony, but I was just wondering if there was a close calculation for this type of thing.