I just did two 5-gallon buckets and total net wt was 138 pounds...
24 pounds of scrap (17 & 22 rimfires & Berdan 7.62x39, 8x57 and 7x57, berdan or crimped 9mm, damaged cases, etc).
13 pounds of 45 auto, 45 GAP and 44 mag/45 colt mixed.
7 pounds of 40 S&W.
6 pounds 38/357, 30 carbine, 7.62 Nagant, and a couple 25 auto.
2 pounds 7.62 tokarev, 357 sig, 10mm, FN 5.7x28.
40 pounds mixed 9mm, 380 and 32 autos.
12 pounds of mixed Boxer primed large rifle calibers (308, 30-06, 270, 243, x39s, x54Rs, etc.
30 pounds of 223.
2 pounds of dirt & trash.
1 pound of loaded rounds of various sorts (mostly 22 LRs and steel-case stuff but a few nice items)
1 pound that vanished..? Probably rounding error on the buckets' tare.