[Burnt Powder]

In reality the fact that the cheapo Federal hull has a wound paper base wad and the Gold Medal has an integral plastic base wad makes far more difference than whatever difference you may have found in volume. Your procedure of measuring is very flawed. Hulls are seldom the same size and Unique seldom settles evenly. Unreliable information and measuring process at best.

BP

 

[Burnt Powder]

Yes, and when you measure capacity of a metallic case you have to trim them to the minimum length and what you do is weigh the empty case, then fill it with water while weighing it and compare the weight. Otherwise you get water still stuck to the inside of the case that you can't get out. Water still has a specific gravity of one so....

BP