Steel Challange 22's
I read the replies and felt that maybe I could add a little something for you. At the last steel challange I attended, I saw two Browning Buckmarks fail to feed. Thier owners were out of the game. I don't know if this is a common problems with them. Many shooters like the Ruger Mk11 or newer 22/45. I shoot a Kimber conversion on my 45 frame. It is one hole accurate at 12 yards, never fails to feed and the extra clips are available and not too expensive. You will need a total of 5 clips for your 22.
I noticed that there is also a 22 conversion for the Browning High Power and it is made by the Ciener company. Essentially, it is the same as the Kimber, a fine quialty unit. There are others but some are very pricey.
Any semi auto 22 pistol that fits your hands and points well for you will work. You need to make sure you can get extra clips for it. I like a 36 grain 22 bullet in a high preformance brand. The stouter ammo seems to ring the steel better and feed in most autos reliably.
I am sure there are many quality choices when it comes to a 22 semi auto pistol. Shoot what feels good to you and fits your budget. You may want to go to an indoor shooting range and try a few in order to see which one you like.
Good luck out there.