I think Redhawk, moderator of this forum, had a 454 Casull rechambered to a 460. I'm just starting out with my 308; so far I like it very much, but not as much as my 7-30 Waters - yet. If you want to do a lot of shooting relatively cheap you can try the 223, but you don't have multiple calibers in one. You could also try a 445 Supermag. You can shoot the 445, 44 mag., and 44 Special.