re: Walther p22 handgun

It's cheaply made .22, it will however last for tens of thousands of rounds. The rifling will disappear and turn into a smooth bore pot metal pistol. You will have Malfunctions with the P22, I experienced 1 per every 100 rounds on average with all types of ammo. The dirtier the pistol the more frequent the failures. I still enjoy shooting the P22 though.

If you shoot 1911's maybe look into ATI/Sig 1911 22's.

Ruger Mark III' are fantastic, accurate and well made. Their downside is taking the pistol down for cleaning, it's a pain. Plenty of models to choose from and after market parts.

Browning buck marks are good to go.

Most common pistols have a .22 variant or conversion kit. I suggest getting a .22 version of your carry piece or HD piece so you can practice more with that type of pistol for cheap and get used to the controls and handling.