I'm going to stand in & defend my 1-14 220 Swift. I'm a velocity freak & like Weatherby believe that speed & hydro static shock kills. I've taken over 300 animals with my Swift ranging up to 450 pounds, most of the with a 52 grain Sierra match king & good shot placement. I've been fortunate to have been invited on lots of cull whitetail & exotic hunts here in Texas. The 52 will enter & penetrate then just explode inside, rarely exiting, & leave the vitals like Jell-O. 99% of my animals traveled NO more than 10 yards & most fall dead in their tracks. I don't think you need a fast twist or big bullet with the Swift, just one that will penetrate & cause massive damage inside. Don't laugh at the 52 SMK's in your 1-14 Swift until you try them. My other bullet is the old 55 Nosler Ballistic Tips made in the beginning of BT's before they changed to a lighter varmint jacket.
Jim D