In another thread it was discussed that differences in case capacity between brands can lead to over pressures. Is there any correlation between case weight and capacity - i.e. the more a case weighs, the less capacity?
As part of my research, I weighed 5 cases of 7.62x39 from 5 different brands and took the average weight:
PMC - 116.24gr
FC - 117.82gr
Winchester - 122.5gr
Fiocchi - 119.24
S&B - 119.24
Could I assume that the Winchester has the least case capacity since it has the highest average weight? Also, I was surprised by the amount of difference in weight of the 5 cases. It seems all the brands had a pretty wide range with a couple with more than 6gr between the lightest and the heaviest case.
