Somehow 32 ACP and "just for fun" don't quite fit in the same sentence. To me, a 32 ACP is just a tool for SD. It doesn't have enough "omph" for fun like a S&W 500 or even a lowly 9mm would. Ammo is expensive. Guns made for the cartridge aren't target pistols. Dunno, if I wanted to shoot just for fun, I'd stick with a 22LR or 9mm for regular plinking.
I personally relegate the .25 ACP, 32 whatevers (incld 327), .38 Spl, & 40 S&W to be defensive calibers (yes, even the 25 & 32).
357 mag, 44 mag, 45 ACP, S&W 500 for when I am bored.