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Actually no.
Mean group radius is how the US army selected match lots of ammunition for camp perry, national match shooting and sniping. I found an article on it in an old american rifleman on the...

Accurate ammo, use the mean group radius. Fire 24 10 shot groups, measure the distance between shots and average them all. Then you will know the accuracy of that ammunition in that rifle. If you end...

I got caught with doing 3 shot groups with a rifle that was shooting erratically. Initally blamed the scope, so changed it and re zeroed. Thought the 2nd shot must have been bad cos 1&3 were spot on....

Nothing will walk away from 1moa but most rifles are capable of less. At any range it is external factors like wind, angle to target, shooting technique and position etc that have more effect than...