If you reload the 500 using hardcast bullets, the cost comes way down.
50 Caliber: about 50 cents each.
Or cast your own for about 3-4 cents each.
AR15 9mm, Turk Mauser 8mm, Russian Mosin Carbines excellent condition, NorCal: Link
WTS Mosin Spam cans - Romanian 7.62x54R in NorCal: Link
WTS Ruger Vaquero 357 Stainless, Ruger Single Six, Egyptian Helwan 9mm in NorCal: Link
Colt Trooper 357, Webley 45, S&W Victory 38 in NorCal: Link