220 Swifts normally had a 1-12 twist, but some have had a 1-14 twist. The slower twist the faster the projectile, as less force is placed on rotation and more on forward thrust. But I think all modern 220 Swift rifles have the 1-12 twist rifling.
220 Swifts normally had a 1-12 twist, but some have had a 1-14 twist. The slower twist the faster the projectile, as less force is placed on rotation and more on forward thrust. But I think all modern 220 Swift rifles have the 1-12 twist rifling.
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