Looking to have a Ruger Alaskan 2.5” 454 ported. Where besides Mag-na-port Industries?

It won’t help.

Check Jerry Miculek videos. He has all his revolvers ported by an expert.

I have had two Ruger's customized by Gemini. Excellent work, no after issues on either.

https://www.geminicustoms.com/...19389247894287109375

I bought a Freedom Arms revolver in 454 Casull magnum, that is Magnaported, it has a 7"plus length barrel.
I don't know how the recoil is shooting an UN-Magnaported barrel, but this pistol still lets you know you pulled the trigger on something that is releasing some energy.

I also have a S&W 460 (8" barrel) that comes with a muzzle brake. It has a stout recoil but I find the 460S&W to be less objectionable than the 454 Casull short, violent recoil pulse.

My Dan Wesson 445 SuperMag does not have a muzzle brake and is very close to the 460 S&W when I load full house loads for it.
It will also shoot 44mag,or 44 special so finding a comfortable round to fit most anybody is easy to accomplish. 44 magnum out of the Dan Wesson are very easy to shoot.

The 460 S&W shooting 45 Colt is also very tolerable.
I can also shoot 45 Colt out of the 454 Casull Freedom arms, very comfortable to shoot. The Freedom Arms 454 has an extra cylinder that allows 45 ACP cartridges to shoot in it, that combination is VERY controllable.

I would put more emphasis on a lesser cartridge than a muzzle brake. I doubt that any brake on a 2" barreled 454 Casull would accomplish much. I would try a few rounds of 454 Casull but go to 45 Colt for any shooting that I required to be enjoyable.
That short barreled revolver firing 454 Casull would NOT be fun!

Just my own observations on Magna-Porting. I had four revolvers M686 .357 3", SP101 .357 3", M36 .38 3", M60 .38 2" done back in the early Nineties. Tested and took notes before the porting and after. All are SD guns, I didn't do it just to reduce recoil.

Observations:

1) Porting doesn't necessarily REDUCE recoil, it actually REDIRECTS it. Instead of focusing on the weak web of the hand, it redirects the recoil vector lower towards the palm. More control-ability and less pain with higher recoiling cartridges.

2) Reduces the muzzle rise after the gun is fired. With my guns, it appeared to be about a 50% reduction in rise.

3) No difference in muzzle flash in pitch black test conditions. However, this was using quality SD loads with flash retardant powder. The factory .357 Mag used was Federal Premium JHP 125 JHP of that era.

4) No issues with porting sending stuff out of the ports and into the eyes/face. My testing was utilizing standard shooting positions and retention. If you intentionally hold the gun CLOSE to your face, you're going to get some debris on your face and risk injury.

In short, it was worth it for my SD revolvers. Not as much muzzle rise, faster sight re-acquisition, faster follow-up shots, better control in the hand, less pain with hot loads.

None of these guns were large revolvers with really heavy hunting calibers. My findings may or may not transfer.