We have a Walther P22 and it will only reliably handle CCI mini mag 22lr and a comparable Winchester, both in 40gr. Much less than that and it doesn’t work...jams, won’t eject the spent round...etc.
I’m not an expert so I don’t know why but I do know its a very finicky eater.
I find it to be accurate enough with a practice clip or 2...but yes i can be all over the paper... :]
If I were the person asking, I would trade it for another that felt better.
I am currently looking at a baretta .32 for cc or maybe even a sw airlight 38 [tho I prefer the pistol over the revolver.]. I’m trying to decide if small is best or more power is better.
My current thinking is that any encounter needing a gun will be close in so small would be better: something to reach and grab maybe in desparation....
Hard to beat for the $$