Like any other rimfire rifle, a semi-auto .22 L. R. rifle will have a preference for certain brands of ammo.
I own a T/C Classic. I free-floated the barrel when I acquired it and tested various brans of ammo. Mine has an affinity for CCI Green Tag, which produced 1 " groups at 100 meters, CCI Std. Vel. - 1-1/4 inch groups and CCI Mini Mags - 1-1/2 inches at 100 meters. It did no like Federal 711, PMC Scoremaster or Aguila. I'll be testing some Wolf Match Target soon and will share results.
The only complaint I have is that the trigger is "Lawyer-proof". I'm sure groups would shrink if I could adjust the trigger pull weight. :cb2: