You betcha. Go for it.
Both rims are essentially .473" in size. Of course the .308 and all other cases in the .30-06 lineages are rimless whereas the Swift is a semi-rim but the bolt head will not give a hoot about that.
Since you are going for a Swift (you are doomed!) then go for the tube that will allow it to be a Swift. That means a 26" or even a 28" barrel. A bit more speed and get the blast a bit further away from you too. Free FPS is always nice.
And if you want a screw it on and shoot barrel, then I suggest a Criterion. And a 1/10" twist if you are keeping your bullets under 60 grains. My current .220 Swift has a Krieger barrel on it with a 1/14" twist and it handles all bullets weights up to 55 grain with aplomb. But when the day comes when it's time for a new barrel I think that I will go the 1/10" route. I do not shoot the long heavy bullets in my gun. Dont need to.
With the many excellent barrels out there it is almost a coin toss as to what put on it. But a Criterion or and X-Caliber is where I would look first. Stainless steel too. May as well get all the life out of it what you can.
As a 40 year .220 Swift owner and shooter you bet that I am a fan. Once you get one you will be too, big time. Hence the "doomed" reference!
