The question is, why are you doing it. ?
If you just want to do something that you can win at probably go for rifle, if you enjoy perfecting something that you are not so good at stay with pistol or go with rifle and perfect it till you hit 100 every time.
I see people all the time fixated on winning and really holding themselves back in the process.
I picked up an air pistol for the first time last Nov and have never been close to a 530. 260 in a half match and 512 in a full match.
I am showing improvement and enjoying it, in the last .22 rifle bench rest match I shot 199/200 and got a nice silver trophy to keep for a whole year and a little naff plastic thing to keep forever
But if I had to give something up it wouldn't be air pistol
br22