The recommended ammo;
High Standard--they test fire their new guns and ones in for repair with CCI SV. You can check this out at Rimfire Central on the High Standard forum and check with High Standard in TX as well.

Smith-- I've also seen posts on Smith 41's stating CCI SV is a factory test ammo and recommended, on the Smith and Wesson site and forums--you can ask over there and they should verify for you too.

I also happen to like it for a number of reasons;
NEVER any duds
Reasonably accurate
Burns VERY clean--nice in a target pistol you don't want to be stripping all the time, yet don't want the action gummed up
Reasonably priced--$24.99 at Dicks or at Champion Shooters
Finally, if I set up my High Standard magazined for CCI SV, they will also always feed Wolf MT, Wolf ME, SK Jagd Std.+ ande Eley Target Pistol completely reliably too

Just my two cents,
Steve