A former S&W employee told me that he was scheduled to shoot the .357 M-60 when it appeared. He said that the first shot didn't hurt as bad as he'd feared, but by the time he fired the fifth shot, he thought, "Thank God, that's over!"
The moderate Short Barrel Speer load should be bearable, and I suspect that the hot Plus P .38 load from Buffalo Bore might be a good choice in this gun. It's about like the old .38-44, but with a better bullet.
I think the Ruger SP-101 handles recoil better and is just enough larger to help.
My opinion is that when S&W made the .38 M-60-4, they had the uiltmate three-inch J-frame.They should have quit there. But the Ruger SP scared them into thinking they needed a similar .357, so they made it.
I have no desire to buy one. But if you need minimum bulk in a trail gun that may have to stop a grizzly or a cougar, it may be the best choice in a small S&W. I just prefer the Ruger SP in that role, or would wear a four-inch K-frame .357.
For the five shots in the cylinder, I think many seasoned shooters can cope with recoil. That's about all the time a bear will give you, anyway. I don't think it's a good gun to shoot for more than maybe 10-15 shots at a time with Magnum ammo, lest you develop a flinch.
The M-60-4 is shockingy accurate for a gun of this type. If that holds for the .357 guns, they'll take small game cleanly and blow away any snake problems. Or, human problems.