03-26-2014, 10:15 PM
I couldn't find a reliable definition anywhere, but based on my reloading books and experience a "wildcat" refers to the cartridge, rather than the chamber. There are a handful that can be formed by fireforming with factory ammunition (Ackley style), but most require some form of modification to the cartridge in order to produce functioning ammo. I think a sub-forum would best serve those variants that require necking up/down or other modifications that make them incompatible with a factory rifle.