.22-250 easy to find components/dies etc for.

.22-250 AI- extra expense for reaming and dies, but very little case trimming.

.220 Swift- Rimmed cartridge, kind of a pita to stack in the mag, no real performance edge over the .22-250...got a little old school panache though...

Ingwe

"...the left considers you vermin, and they'll kill you given the chance..." Bristoe