3 shot groups look good but seldom hold up to 10, shoot the challenge...
I think I saw that on arfcom's industry page and it may not be official so please disregard. However I think since Mark's main goal was to show how accurate his barrels are, he ain't gonna let a dog slip through.
My Colt chrome lined pencil barrel is a 1.5 moa shooter, out to 400 yards but that's 3 shots too. Which now 3 shots don't impress me, even 5 doesn't convince me now, dang that wareagle guy...
