it be 1/2 Scope adjustment

Cheers,
I've done a lot of bench rest- 1000yd stuff and I find it better to think in the true minute of angle which is an angle from the muzzle of you rifle to the target. At 100 yds a minute of angle is 1", 200=2", 300=3", 400= 4". The typical bases for describing the accuracy of a weapon is in minute of angle. Most factory pieces like to claim a minute of angle gun which would be a 1" group at 100 yds. Few do -Most don't even come close. Following the above table your scope at 400 yards your on click adjustment will move the point of impact 1". 1/4 X4 =1. Be fully aware that the same compensation is to your horizontal movement. For my .22-250, I use on maximum point blank set for a 4" spread. This leaves little error in quick target situations. DB
 
actually, moa is not exactly 1". more like 1.047 which can add up. bottom paragraph page 2. maybe it is different from scope to scope? but 1/4 moa and 1/4" at 100 yards is different

http://burrisoptics.com/pdf/BALLPLEX.pdf


The term “Corr@100” is often used in this article and refers to Correction at
100 yards. This refers to how high a bullet must be at 100 yards in order to
impact on target at a target further down range. Some would refer to this as
synonymous with Minute of Angle (MOA), which is very similar, however would
be misused slightly in this discussion. For your reference, one minute of angle
is 1.047 inches at 100 yards. 1.000 inches @ 100 yards versus 1.047 inches at
100 yards is small, yet it translates into 1.5 to 3 inches of point of impact variation
at 500 yards for most big game cartridges.
 
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