The 220 swift has utilized a 14 twist barrel for a long time. 50/55gr bullets seem to be the norm in that venue.
Likewise, the 26" barrel has been there just as long. Lots of powder relatively speaking, a long barrel helps all of that.
If you are interested in a heavier bullet, the faster twists will come into play, take a looksee at the rifle blank charts.
Tis hard to get past the basic old swift characteristics for a lot of thngs, but the AI version helps with the stretch of case.
Wildcats come and go that try at the swift, but the original swift has endured.
Basic swift is 26" barrel, 14 twist, 50-55gr bullets. Norma factory ammo is pretty close to published figures.
A fine cartridge.
