9mm, 59.46gr/ea, 117.7cases/#, 8.5#/1000
38spl, 68.06gr/ea, 102.8cases/#, 9.7#/1000
40s&w, 70.1gr/ea, 99.9cases/#, 10#/1000
.357mag, 78.3gr/ea, 89.4cases/#, 11.2#/1000
.45acp, 89.58gr/ea, 78.1cases/#, 12.8#/1000
.223, 95.28gr/ea , 73.5cases/#, 13.6#/1000
.44mag, 114.38gr/ea, 61.2cases/#, 16.3#/1000
50bmg, 865.26gr/ea, 8.1cases/#, 123.5#/1000
All weights are uncleaned fired cases with the primer remaining.
Individual case weights were derived using an average of mixed brass weights (except 50bmg)
So, if you picked up 8#?s of 45 brass: 8# X 78.1cases/# = 625 cases+/-
If you use 1gal ziploc freezer bags to store your brass, each (full) bag contains:
9mm, 15.6#, 1836cases
40s&w, 12.2#, 1219cases
45acp, 11.4#, 890cases
223, 11#, 809cases


.:: 
"The tank, the B-52, the fighter-bomber, the state controlled police are the weapons of dictatorship. The rifle is the weapon of democracy....If guns are outlawed, only the government will have guns. Only the police, the secret police, the military, the hired servants of our rulers. Only the government and a few outlaws. I intend to be among the outlaws." 