RE: .22-250 vs. .220 Swift
Over the years i've owned several of each, and if i was makeing the choise today, i'd take the 22-250. The Swift will cost you a lot more to own in many ways, as Swift ammo cost more. (even if you reload) Also, you have more choises in guns with the 22-250....
In this case the performance difference isn't worth considering...
DM