I am shooting 59.0 gr. of Swiss 1-1/2 behind a 410-gr. bullet in my Browning .40/65. I bought a full case (25#) of powder all the same lot # and each jug has a different loft in the case. I weigh my charges to 1/10th gr. and all the cases are the same manufacturer. The volume in the case is anywhere between 1/4" and 3/16" between different lbs. of powder. My accuracy load is 59 gr. so I do not want to deviate. Should I be more concerned with weight or volume? I understand that Swiss does not like to be compressed, what should I do?