There are lots of choices for wild cats based on the original short magnum cases. YOu could do any number of things such as: 30-338, 308 Norma, 358 Norma, 375 Taylor, 9.3-338, 264 win, 7mm wby, etc... lots of choices. I designed my own wildcat based on the 338 case, and while I probably wouldn't do it again, but it does what I wanted it to.