I have a 8 twist Krieger on my 220 Swift. I shoot 80 grain VLD Berger's.
Shooting prairie dogs in the wind your holdoff will shrink by more than half compared to shooing 52-55 grain bullets. Also your effective range will increase significantly. I did shoot a 10 shot 14 inch group at Williamsport without any load development. Suggestions for longer barrel clean the barrel really well and do it often. in my experience the Swift is more accurate than the several 22-250's that I own or have owned.
Shooting prairie dogs in the wind your holdoff will shrink by more than half compared to shooing 52-55 grain bullets. Also your effective range will increase significantly. I did shoot a 10 shot 14 inch group at Williamsport without any load development. Suggestions for longer barrel clean the barrel really well and do it often. in my experience the Swift is more accurate than the several 22-250's that I own or have owned.