I own several 25 autos including two 950 B Berettas as well as two
950 Bs in 22 short. I have done some chronographing of various 25
auto 50 gr FMJ factory loads and there can be considerable differencies
in velocitys between brands. I have done penetration tests in wood
and wet newsprint with the 25 and 22 short and 22 LR from short
barreled revolvers. In similar barrel lengths the 25 is way ahead of the
22 LR penetration and the 22 short is not even in the running. Not to
start any disputes but I find stories about 25 FMJ bullets getting
stuck in pectoral muscles with no further penetration impossible to
believe. Jell tests show 25 FMJ penetration of 12"-13" and 32 FMJ
penetration of around 16"-18". In my own limited tests in wood good
32 FMJ ammo will slightly outpenetrate good 380 FMJ. As with any
handgun round shot placement is crucial but carrying a 25 with good
FMJ ammo is a long way from being unarmed.