By all accounts the 45 Raptor beats the 450 Bushmaster in performance. At 100 yards, the 45 Raptor has about 700ft lbs of energy over the 450 Bushmaster still. I think the main draw to the 450 Bushmaster is it's convenience. I can get an upper for $550 and slap it on a lower I already have. But for some reason I'm so stuck on the idea of getting a DPMS G2 and getting a 45 Raptor barrel put on it! Both would be more accurate than the shotguns I currently use for deer hunting in the restricted areas of Michigan. Anybody that lives in the areas of the midwest that restrict to straight walled cartridges want to chime in on this one? Thanks!