I looked up the ballistics from the same
company, Reeds Ammo & Research offers:
.32 H&R Mag.
100 gr. Hornady XTP JHP @ 1,200 fPS
9mm Mak arov
95 gr. Hornady XTP JHP @ 1,047 FPS
So the smaller dia. bullet has a bit of velocity and
sectional density but what platforms are we talking
about for SD?
Ruger SP-101 or S&W 631 - 6 shot .32 H&R Mag.
CZ 82 12 shot double stack in 9mm Mak.
I'd take the Mak with these choices.
Randall