A bottle of BH209 is 284grams which is 4382.783 grains. So divide the total grains of the bottle by the grains that you use. I use 90 and can get roughly 48 shots per bottle. However with spillage etc that would probably drop to 45 shots a can. So lets say at $32 a can with 90 grain charges it cost me 71 cents a shot. So with my bullet roughly its 40 cents for one. Now the sabot is 16 cents each. So the grand total per shot is $1.27. So I average 25 shots a session which then cost $31.75. Is it cheaper than a centerfire? No but its not more expensive then a centerfire. If you figure on cleaning also that would be a guess. But I would say five dollars total for everything each time you clean. So each weekend If I shoot I spend $37 dollars. I know a hell of lot more expensive hobbies than that. So just for kicks this is what I would spend in a year if I shot 25 times per week. $1776 And thats just one rifle. Now I feel sick...why did I do this. Just don't tell my wife.