For a duffer with a .38 in the bedside table drawer, he might be better suited with a box of boutique ammo than with a High cap 9mm or a new .357 Magnum.
As always, JMHO-YMMV............
You shamed me into digging out some old logs until I actually found some data, amigo.I didn't find the 4" data, but I found this:
On 20 November 2005 it was 60°F at the Albuquerque City Range (5950'>sea level) when I shot the Federal .38 Special +P+ 147-gr Hydra-Shok load out of my 3" Model 65-5. My notes indicate the round did an average of 896 fps, with a spread of 25.4 fps and a completely respectable standard deviation of 8.67 fps.