460 Magnum: $750
Rounds for same: $0.30 each
Don't know if you've priced them lately, but the cheapest commercial loads for the 460 are about $1.50/round. Even handloading, I have only been able to get the price down to about $0.80/round, the bullets themselves are the most expensive part.
Oh, dude, that hurts! I was using a number typical for 45 ACP, and I did realize Magnum rounds are typically more, but I had no idea of the ratio.