Ranking recoil:
I opine that the action type will have a lot to do with it (the Semi-Auto's recoil spring absorbs a lot of energy and feeds it back to your hand over a longer period of time than the inflexible revolver frame.
Abber, Krezyhorse and Bossman are pretty much right. Let me expand a bit.
I owned a S&W Model 28 Highway Patrolman. This is the same "N" frame as used in Smiths' 45 Colt, 45 ACP revolvers, 41 Magnum and 44 Magnum (Model 29). It is heavy. That weight can mitigate a lot of recoil force.
I also own other .357 mag revolvers from SP101, Security Six, GP100 (Rugers, all) and a Ruger Blackhawk.
I own Lightweight and all-steel 45 ACP semi-autos.
I also own a 1911 pattern .357 Semi-auto (Coonan Model B)
And a recently acquired (so it has not been shot much) Ruger Bisley Blackhawk 45 Colt/45 ACP convertible.
If I lined up all these guns on the shooting range bench, here is (by my best recollection) how the recoil would rank, from least severe to the most severe.
This is, perforce, COMPLETELY subjective, for a lot depends on the fit of the grip to my hand and brand of factory ammo I was using (I tried to avoid recollecting my handloads, which I vary in power levels).
Fullsize 45 Auto (Colt, Randall, AMT)
Colt Officer's Model (steel frame 45 Auto)
Blackhawk 38 Spec
Ruger Bisley 45 ACP
Highway Patrolman .357 Mag with target grips
Lighweight 45 Auto (Star PD)
Coonan .357
Ruger Bisley 45 Colt (standard loading)
Highway Patrolman .357 Mag with standard grips
Security Six 357 target grips
Sec. Six 38 Spec (comparable in weight to the S&W "K" frame model 19)
Blackhawk 357
GP100 357 mag (comparable in weight to the S&W "L" frame model 686
Security Six 357 standard grips
SP101 38 special (much heavier than S&W J frame)
SP101 .357
I reserve the right to revise, repudiate or even forget all about these rankings, as I have never really run comparison tests rigorously. I put the effort into making this list because I think it is about right and it might be informative, or encourage others with more trigger time and more recent trigger time to post their own opinions.
Pay particular attention to:
1 where I ranked the S&W "N" frame Model 28 (Highway Patrolman) with different grips.
2 Where I ranked the Security Six 357 with different grips
3 where I ranked the same guns shooting 38 special vs 357 magnum
4 where I ranked the Sec Six with 38 special vs the same gun with target grips and .357 mag
and, perhaps most significantly
5 where I ranked the (comparable action type and weight) Coonan .357 and full size 45 ACP automatics.
You can see that I ranked the (fairly comparable in weight) full size 45 ACP Autos as much lighter recoiling than the Coonan .357 Auto and the Ruger Bisley shooting 45 ACP as lighter recoiling than the Blackhawk 357. Part of my felt difference might be grip size and shape (The Coonan has a BIG grip to accommodate the length of the .357 cartridge) and the Bisley grip is significantly different in shape to the Blackhawk and is reputed to be more comfortable in recoil.
About grip materials, size and shape. The (smallish and unyielding) wood grips of my Redhawk 44 Mag vs Pachmeyers on the same gun shooting the same ammunition make a world of difference. So, I opine that you can do a lot to soften the recoil of the S&W .357 mag by choosing the best grip for your hand.
I hope this helps
Lost Sheep