As already said, PP shooting is short range and the targets ate quite large. "Precision" shooting it isn't - more about speed so BB pistols are fine. You can use lead BBs at clubs where steel are banned (because of rebounds) if allowed.
On some courses of fire reloads will be needed - either mandatory of because of the length of the stage (number of shots).
So, if you want to dabble for a bit of fun I'd suggest something like an RAC 1911 and these are not daft expensive. Plus a spare magazine.
I use one of these for the Police Pistol competition (and some of the other comps as well) in the Umarex Boys Club monthly matches - great fun.
FAS 604, Remington 1911, Colt SAA, HW45, BSA Mercury, Winchester underlever (Walther), SMK QB78