Of the big boomers I've shot, the .480 Ruger is about the best combination of power and controllability. The hand rifles give you only a single shot at a time, the Blackhawk .475 Linebaugh is downright painful, even the .454 isn't pleasant after a few cylinders full. The .480 SRH with a 400 grain Lee cast bullet can be loaded to the same levels as a .475 Linebaugh if the shooter so desires. The Lee bullet has 2 crimp grooves and when seated out to the outer groove, the case has the same capacity as a .475 case. The SRH cylinder is long enough to handle it and will also stand up to standard pressures of the .475. Apparently, it is marginal for proof loads, which is the only reason I can see that Ruger doesn't chamber it in .475. I suppose a cannelure tool could be used to put a second groove on jacketed bullets if a person wanted to go that route, or possibly even ream the SRH chambers deep enough to take a .475 case.