Von,
I'm going through the same thing, but with the opposite end of the spectrum -- my 17 oz. .357 Ruger LCR.
So far, I've tried:
-- CCI Blazer aluminum-cased 158 gr. hollow points
-- Remington 110 gr. SJHP
-- Hornady Critical Defense 125 gr JHP
-- American Eagle 158 gr. SJSP (soft point)
Youtube videos of gel tests are available for most of these -- from both snubbies and regular length barrels.
The Blazer 158 is very mild to shoot, but also very underpowered. It doesn't seem to perform well in tests.
The 110 grain stuff is
very controllable in rapid fire from the lightweight snubby. It was accurate too. There was some flash when I was shooting it in a somewhat dark indoor range, but it wasn't too bad. On the other hand, gel tests seem to indicate that penetration can be shallow at less than 10 inches. It expands well, and fragments, though, even through denim.
The Hornday round has little flash and is still controllable in rapid fire, but my rapid fire is less rapid than with the 110 gr. Remingtons. It's also more expensive. The gel tests are extraordinary, even from snubbies. This is my carry load. I think that a 4-in N-frame would handle it very nicely.
The 158 SJSP is controllable in the sense that my hands don't come apart and my grip is stable, but rapid fire is impossible for me with the Ruger LCR. I can do 15 to 20 rounds in a single session before my hand is too tender and swollen to continue. It's freakishly accurate, though.
The photo below is five shots of the American Eagle stuff at 7 yards:
Regards,
-Drew