See my avatar.
I've owned a B36, N37, B38, N49 (still), N442 (still), 640 (38) (still) and my 340 PD.
NOTHING carries better in your pocket.
I shot Federal "Low Recoil" 357 (Shame on Federal. It's a FULL POWER 357),
Speer GDSB 357 & 38+P,
Corbon DPX 357 & 38+P, and the load I carry in it,
Buffalo Bore 125 grain 38+P.
If those were not available, I'd load it with DPX +P.
I have read that Scandium guns don't like lead,
otherwise it would be loaded with BB 158 non +P.
Follow up shots are most important to me,
which is why it's loaded with +P's.
I'm not a cop and don't have to arrest anyone.
If I have to use the PD, I believe it will be at a range of 8 feet or closer.
At that range, I am comfortable with +P and my ability to shoot
with accuracy and speed.
I also believe if it was built strong enough to shoot 357's, it can shoot ANY +P.
The 120 minimum weight bullet applies ONLY to 357's according to 2 people at S & W.