What Marshall and Sanow have to say about .32 ACP defense ammo.
I may be starting a fight, but I'm more of a believer in what's been shown to work on the street.
That basically means listening to what Marshall and Sanow have to say on the matter.
stoppingpower.net
The below information is a paraphrased version of a post/article which I found on the net which I happen to agree with.
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Energy from the 32 ACP is nominally 125 fpe, 22 LR is 80 fpe, 22 mag is 150, and 25 ACP is only 60 fpe. Of all these "mouse gun" calibers, the 32 ACP manages the heaviest and largest diameter bullet. "One shot drop" stats for the 32 ACP are considerably higher than the smaller calibers --even the higher energy 22 mag.
Standard wisdom is that 380 ACP /9mm Luger or .38 Special are the minimal calibers that should be used for defense. The 380 ACP is easily more effective for defense, but the 32 ACP seems adequate in "low risk" situations like going to the local store in the suburbs to get a quart of milk where the odds of being engaged in a tactical fire fight are slim to none.
Despite the standard criticisms, I include "Marshall & Sanow's Street Effectiveness Figures for the .32 ACP Cartridge" for comparison.
CorBon is conspicuously absent from the data (perhaps they just didn't test it or have it available for whatever reason), as are Gold Dot and other "custom" or +P loads. Kel-Tec notes the P-32 will manage +P ammo, but recommends not shooting it excessively. Note too, "one shot drop" stats. for this caliber vary widely.
Winchester Silvertip JHP 60 gr. rates 970 fps, 125 fpe, 63% drops
Winchester FMJ 71 gr. rates 905 fps, 129 fpe, 50% drops
Magsafe Defender JPF (?) 50 gr. rates 1250 fps, 174 fpe, 57%.
Glaser Safety Slug JPF 50 gr. rates 1065 fps, 126 fpe, and 46%
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Out of those I'd probably pick the Winchester Silvertip since it has the highest rating and since it's been around the longest.