Colt SAA pretty well summed it up. As to handloading - the 500 S&W is very versatile and you can reload for your needs rather cheaply compared to purchasing commerical. With hard cast bullets I think you'll find your cost to be in the neighborhood of $.37 a pop - cheaper if you cast your own. Unless you want to push velocities past 1,500fps you can go with Winchester large pistol primers - you'll get lower pressure and the velocity drop will be from 25 to 30fps less than with the rifle primer.