I've put just about all of the major manufacturer's ammo through it and other than one round with a dud primer (three strikes and it still didn't fire), it has run like a champ. That was both standard velocity and high velocity stuff.
My normal high velocity .22 ammo is the Remington Viper, but I always seem to have a hodgepodge.
Some say that you shouldn't run American Eagle through it, but I didn't have a problem with the two boxes I put through it.