My favorite round out of my P22 is the Aguila SniperSubSonic, or as Uncle calls them, “those stubby Aguila rounds“. I’ve had some fun comparing terminal ballistics of rounds before, and I thought it would be fun to do it again.
A 60 grain .22 LR round clocks in at about 700-750 fps out of my Walther P22. That equals 75 foot pounds of energy.
A .32 S&W Long pushing a 98 grain bullet at a measly 705 fps is going to generate 108 foot pounds of energy.
A .32 S&W (not Long) with an 85 grain bullet at 680 fps is going to generate 87 foot pounds of energy.
Compare that to a 40 grain CCI Mini-Mag, which from the P22 is pushing 900 fps; that comes out to 72 foot pounds of force.
A .25 ACP 50 grain FMJ actually has less energy (67 foot pounds) than the Aguila rounds out of my P22. Of course, it probably feeds a bit more reliably.
Now, this is all a fun game, because foot pounds of force don’t necessarily equal reliable stopping power. At the same time, it’s educational to note that the .32 S&W Long, which was the standard police cartridge of the NYPD for quite some time, offers very little in the way of a ballistic advantage over a 60 grain .22.
Of course, if I really wanted the “perfect” carry gun, I’d just figure out a way to bubba my P22 into carrying a .25 ACP necked down to hold one of the 30 grain TNT bullets that CCI uses in their .22 Magnum loads.