Re: .22-250 1-10 twist
I shoot a .22-250AI with an 8 twist built to shoot the 75 A-max. This was originally a straight .22-250 with a factory 14 twist. The factory barrel shot the 55s extremely well, but never tried the 60s. If I were you I'd go with a faster twist than 14, to give yourself options. A 10 twist seems to be a fit, but l suggest going with the 8.