Magnaport did wonders to my Freedom Arms in 454. Recoil does not bother me but when I first fired it, I was surprised. It was worse than my 3" S&W 500. After porting its a pleasure to shoot.
If you go with a larger caliber consider Magnaport.
It's interesting. I have a number of Freedom Arms handguns, Model 83s (.454, .475, 500 WE) and 97s (.41 Mag, .35 Colt). For me, they all handle recoil very well, having a big fat grip that let's me get a really firm hand on the gun. Then, just hang on, it'll blow your arm all over, but doesn't hurt. One of each caliber has ~ 4" barrels; I find the barrel length makes no significant difference to recoil, surprisingly. I have 7.5" barrels in .454, 475 and .45 Colt, to get greater range. I inherited one 7.5" Model 83 .454 from my father, who never shot it much, being over 70 when he bought it. He had that one magnaported. Compared to my unported 7.5" .454, it focuses the recoil straight back, cutting muzzle jump. But it did nothing for the recoil intensity. What did really affect recoil intensity is the grip - Dad didn't like the great big grip that came on the gun, so whittled away at it over the years. He finally got it to where he wanted it, much like the grip on a COlt SAA (which had been "his" gun back in the day before the 44 Mag). It felt great for handling, but shooting it was an exercise in masochism = it hurt, especially with those Buffalo Bore 360 gr bear loads. I had the grip replaced at factory.
I'm lucky enough to have a John Linebaugh Ruger Bisley in 500 Linebaugh - a very nice shooting gun, until you stoke it with the elephant load, 525 gr WFN GC bullet at 1100 fps. I can't keep that one from rolling and beating my hand to death. John's advice was, "Don't shoot that round - nothing on earth requires it. He was right. It's about half a 458 Win Mag, in a revolver. I thought very well of John.
RIght up there with the Linebaugh running the elephant load is the S&W 329 PD. From the factory, that one would never fire more than 1 round from the cylinder full, the lock that came on the gun would freeze it up. So I removed that. That gun was very painful to shoot - it felt like I'd swung the flat of hand as hard as I could against a concrete wall. It stung "electrically", rolling my hand back and carrying my arm instantaneously up beside my left ear. I couldn't control the gun and it hurt to shoot, so I sent it off to get it magnaported, on the chance that that would make it shootable. Kelly's quadraported it. When I got it back, I could shoot it about as comfortably as my steel & nickel 4" S&W .44 Mag (also inherited from Dad). Christian Ed not withstanding.
So my experience is that with handguns, magnaporting is far more effective in taming muzzle jump than in altering recoil power. Quadraporting the 4" barrel 329 PD made it into a shootable handgun from the utter beast that it was out out of the box. Magnaporting didn't do much for me on the long barrel .454.
All of this experience applies to me. Felt recoil with a handgun is very subjective and depends greatly on how well the grip suits you. I have a short thick hand, which in handling alone makes me want a smaller grip. But in shooting the big ones, I
need a big grip. It makes me wonder whether guys with Bill Jordan hands (huge, half again as big as mine) might not need an even bigger grip than Freedom Arms puts on their guns. Maybe like the Pachmeyr beast that came on my Field Grade .454, which I had trouble even getting into my hand.