FWIW, the cost difference between for the most expensive rounds and the least expensive rounds I reload is around a nickel. I reload .380, 9mm, 38spl, 357mag, 44spl, 44mag, 45cp & 45 Colt. The .380/9mm rounds are about a dime apiece to reload, and the 44 mags are about fifteen cents. The biggest difference is the cost of the bullets. Calibers starting with a 3 are about a nickel each, those starting with a 4 are more like a dime apiece. I shoot mostly lead and plated.