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Vortex Optics RAZOR HD 5-20X50 RIFLESCOPE — First Focal Plane User Manual

Page 7

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When estimating moving target leads, the mrad marks
on the center horizontal crosshair and the windage
dots can be used. Estimating moving leads will require
knowing yardage distance, wind speed, moving target
speed and total bullet flight times inc. rifle lock time.
Bullet flight times can be roughly calculated based on
fps velocities or a ballistic calculator.

Note: Correctly estimating moving leads is very diffi cult and
requires considerable practice and knowledge beyond the scope of
this manual.

Basic moving lead correction

2.74 mrad reticle correction for a target moving at 3 mph at a
distance of 800 yards. No wind. Total bullet time of fl ight from
moment of trigger pull is 1.5 seconds during which a target travels 6.6
feet. Elevation already dialed into turret.

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Moving Direction