I don't where you get to 200m distance from, but I have seen barrels that won't shoot on call at 600 hold sub MOA at 300. It has to do with throat erosion and how the projectile enters the rifling.

Quote Originally Posted by Alaskapopo View Post
Just curious how does a barrel hold sub moa out to 200 then go to crap past that. Its not making sense to me.
Pat