I am fascinated by the several claims of one-hole groups (for .22) at 100 yards. As I understand it, when you get this result with a rifle of any caliber you hold onto it! .22LR has a pretty low BC. How are these one-hole groups achieved, are they repeatable, and are there witnesses? Please forgive my scepticism... I'm no expert here, so this is new info to me.
I assume that it's just being used as an expression. If I shoot a dime sized hole at 50 yards, I'm happy.