Thanks for the tip Mikey. I have fired 125 grain full power Federal hollow points, and the recoil is not much worse than in my L frame smith. I usually carry and use the 129 gr .38 special+p Federal Hydrashoks in it. It is a lot hotter than regular .38s and it groups good in my M13, M586 and my Ruger sp101. Its good on rabbits out to 50 feet too.
A local gunshop sells them in 50 round boxes for $16. I shoot a lot of reloaded .38s for practice, but I like to shoot the Factory enough to be comfortable with it. Plus I dont get the time to hunt much anymore, so when I do go, I prefer to use the factory ammo I use for carrying.
I remember reading 20 or 30 years ago when the M13 and M10 were still the standard police sidarm, that the 110 grain .357 caused gas cutting of the top strap. That was one of the reasons they created the L frame .357's.
I do use a lot of 110 grain USA brand .357, buyt most of it I run thru the SP101 with 2.25 inch barrel. I think it would make a decent self defense round, and the recoil in the 2.25" sp101 is actually not bad.
The range I did most of my shooting on when I first started shooting a lot when I was young had 4 backstops. 50, 100, 150 and 200 yards. They set up metal plates that would gong when you shot them on each, so my friends and I learned to shoot pistols from 50 to 200 yards. The 4" K frame was reliable out to 100 yards. I could hit the gong 5 out of 6 shots at 100 all day long. My 6" Lframe was more consistant at 200. But it was not as easy to carry.
For any use you need a sidearm, the 4" Kframe would serve well. Plus the S&W revolvers are the smoothest out of the box of any I have used. And I have a Ruger sp101, and Colt Python(when they were made well). My M586 is a better revolver than the Python.