I have Lapua brass in .308 and have been told to reduce my charges by 0.60 over the other brass I was using. Reasoning was the Lapua brass is thicker (overall) and therefore less volume and by reducing the chrarge I will maintain the same pressures.

Does this sound right? Should I reduce the charge to maintain he same pressures? I think the .6 was a result of measuring water in both casings brands and measuring the difference.