Maybe I am completely ignorant, and I dont claim to be an expert, just a guy who has screwed around trying to find what worked and didnt work for him. However, how is there NOT a correlation between case capacity of a fireformed case and its weight? Say you have a batch of 100 new brass. If you fire form them through your rifle, you clean, trim and deprime them and then sort by weight, it seems that any deviation in weight must correspond to an internal volume change being that the cases are formed to your chamber and that the brass doesnt deviate in its density. Cruder than measuring with water? Perhaps, but it seems that it would be better than nothing. I started my long range persuit with Winchester brass several years back. The ES results on the chronograph as I have struggled over the years have shrunk. A big step in that was when I started matching brass. First I started culling from the winchester. Then later I got rid of the Winchester brass all together and switched up to the Nosler matched brass. Good results all around.
Ive heard of using water, water and alcohol, using sand, fine powder, with primers in, out, puttied up, golf tees inserted in the flash holes, tape, ..... I know for internal ballistics programs they want water, but for a field shooter who is simply playing with a .300WinMag or something trying to reduce his ES why is weight sorting so wrong?
Im not trying to flame anyone, just trying to understand why weight sorting as a means for determining a variance in volume for long range hunter not a wildcat experimenting with loads is so wrong. Please educate me with something other than ... "its meaningless"