I tried all 3 of the big boomers and came to the conclusion the .458 Socom is the most practical for ME, and sold the 450 Bushmaster & 500 Beowolf. The 458 Socom uses rifle style bullets and is .458 so all 45/70 & .458 win mag bullets will fit, and not as expensive to load for or buy ammo for as the 500 Beowolf. The 450 is a nasty boar/bear gun within it's range though.