I have no idea what Stiller's specs are. It may be well within. I know Borden says he tries to keep his within .0002. The ones I've seen have been .0002 to .0003 out. And if I remember correctly, Borden's clearance between bolt bore raceway and bolt runs about .002. Still, I don't have any doubt that 1/2" groups will be attainable with the Predator.
