In a small capacity case like the .380ACP, I am wondering if the differences in case capacity from brand to brand is important enuf to keep them separated by brand, and perhaps use a different powder charge based on the difference.
I weighed 5/ea cases of several brands and discovered a 6.4g difference in average case weight from one brand to another. In a case that only weighs roughly 50g, that's over a 10% difference!
Maybe I'm not correct in assuming case weight is in-directly proportional to case capacity; ie. heavier cases have less internal capacity.
I'd appreciate anyone who can shed light on this issue for me.--Thanks