Well Craig,
I'll give you the whole nine yards.
I have a Swift that I use on dogs. 62 gr. MEF Bergers @ 3550 fps.
I have a standard 22-250 that I also use on dogs. The load is 52 grain Hornady Match @ 3650fps.
My 22-250 Ackley spits out a 65 grain Berger @ 3925 fps.
This is NOT basically the same as a Swift, it is on another planet.
These are not estimates, I have a very good Oehler, and I have used friends that were already set up, where I didn't want to wait for a line change; so the numbers are consistant. My machine is accurate.
Okay, now the (not so) bad news. If you have accuracy in your gun, I'd shoot it until it falls off, then rebarrel. The standard 22-250 has killed a lot of coyotes, no flies on that sucker. I hunt a lot of open plains where long shots are the rule, and it is a targeting issue, not necessarily the killing efficency. In other words, it is much easier to hit your animal at various unknown ranges, if you have the increased velocity of an Improved cartridge, coupled with a heavy for caliber bullet. If you rechamber your existing barrel, you will wind up shortening the barrel by an inch or more, and the Ackley needs all the barrel length you can get for optimum performance.
I predict that the 22-250 Ackley will be a popular Factory chambering one of these days. The brass doesn't stretch like a Swift, and I get twice as many loads per case, which is important to me.
Fireforming? I borrowed a "loaner" gun with a junk shot out bore, but chambered with the same reamer as was used in my gun. Took me a little over an hour to blow the shoulder out completely on 200 cases. That was nine years ago, I'm still using the same cases. Saved my barrel life, about 800/900 rounds total, will still shoot in the .300"x5 occasionally. What's not to like?
If you can't stand it, just get one; but don't ruin your trusty rig to do it. That's why I still have the others, they still shoot, but the other Swift didn't, so I bought a Hart barrel for it. By the way, a 1 in 14" twist is very adequate, when you chamber the AI, because of the increased velocity. That spins your bullets at a very acceptable RPM for accuracy. I'd forget about the heavy VLD contours and fast twists. They aren't very good coyote bullets.
If you are impressed with raw speed in an efficent case design, how about a fifty-five grain Ballistic Tip @ 4400? I like the BC of the heavier bullet, but the lighter Nosler gives train wreck type terminal performance, at that velocity.
So, I'm a happy camper! After using a 220 Swift for over fifteen years, I thought I knew a bit about twenty-two caliber predator performance. Guess again.
Good luck, LB (you will like it!)