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Old June 22, 2013, 12:54 PM   #61
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 8,927
There are rifle shooters who can sight in their very accurate rifle standing up on their hind legs without a sling can fire one shot at the target, call the shot, make a sight correction to call and they've got a zero within 1/4 to 1/3 MOA of what is really is. Yes, one shot is all they need. And they don't even have to hit dead center on the bullseye target they're using to sight in with.

These folks also know that the zeros used in the four common field positions (standing, kneeling, sitting and prone, with or without a sling) will not be the same the get when shooting that rifle as it rests atop something on a bench held against their shoudler. Typical differences in zeros is 1 MOA. between bench and field positions. There may be a 1/2 MOA difference across each of the field positions, too.

Nobody holds a rifle exactly the same way in all five of these positions.
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