I bought one from midway a few years back with a hogue over molded stock. Acurassy is as the other fellow stated. I haven't tried any high velosity ammo, just sticking to the pmc moderators and remington subsonics. Worst group is .75", best .22" at 50 yards with rem subsonics. Average is a hair under a half inch. Be sure to get a target hammer, power custom or volquartsen makes no difference, thats what really enhances the acurassy of the heavy barrel since your not pulling the gun when you pull the trigger.
The green mountain is exceptional as well, just depends which one you can find on sale or with a package deal cheap. I haven't heard anything good about a butler creek.