For plinking, CCI and Winchester are pretty good.
For target shooting, Eley is my favorite brand. When I used to shoot smallbore (rifle though) I would shoot matches and the practice or two before with eley benchrest gold ammunition (It's really expensive though). I would usually practice with Eley Club X-tra, it is relatively cheap, very consistent, and unusually accurate for the money.
I used to use the eley ammunition (mostly because it was what I had on hand) when I went plinking w/ the ruger mkII, and it worked very well. The only drawback to Eley ammunition is it's seeming incompatibility with other brands of ammunition (I know it sounds wierd), but my target rifle, and the MKII would digest standard ammunition, and eley ammunition all day long, but if I started shooting Eley ammo and switched to another brand (like the Federal target ammo), my weapon would jam.
The only thing I can think of that would cause this is the thick coating of wax/lube on eley bullets.
Anyway, for plinking, you can't go wrong with CCI or Winchester ammo, but if you really want accuracy, try everything Eley makes, one of their rounds will probably shoot really really well out of your pistol.