rcmodel identified the 158-gr. bullet properly, IMO. From a 2" barrel, a 38+P factory load--or reload, with the right powder--runs just over 800 fps.
If you run overpressure (re)loads in 38 Special cases or build a medium-pressure 357 round with it running at about 900 fps, it also does just fine--no real leading. At 1000 fps , leading starts to show up.
FWIW, 900 fps is about the max I want to shoot from a lightweight 2" barrel.
At the nominal 140-gr. weight, the only decent bullet I know of in a JHP is the Gold Dot Short Barrel 135-gr. bullet. It is designed to open well at velocities as low as 850 fps, but it does tend to break up over 1000+ fps.
FWIW, the typical GDSB38+P factory round runs about 850 fps from a 2" barrel, and just over 1000 fps from a 4" barrel.
eagle103: I wasn't aware of the Speer 140 JHP being optimized for 38+P levels--has brassfetcher tested that one?
Jim H.