I'm not convinced about wildcat cartridges (except for unknown to me specialized purposes). Today, the range of commercial cartridges covers everything from small game to elephants with a lot of overlap. If I want more energy, I'll go with a larger cartridge (perhaps the 260 Remington in lieu of the 257 AI?).
Of course, this ignores the fun of having and shooting something different, but then I might be a spoil-sport. Just my opinion.
