Vortex 6-24x50 EBR-1 MOA reticle manual - Euro Optics Ltd.

SECOND FOCAL PLANEVortex EBR-1 MOA ReticlePRECISIONSHOOTINGTACTICALEBR-1 MOA Manual6–24x50 RiflescopeDesigned to maximize long distance shooting andranging abilities,the EBR-1 MOAreticle can beused to effectivelydetermine ranges,holdovers, windagecorrections andmoving targetleads. Ultraprecision laseretching on the glass reticle ensures that minuteof angle (MOA) specifications can be kept to thetightest tolerances possible. The fine center crosshairsubtensions on the EBR-1 MOA reticle were carefullychosen to provide the optimum balance betweenprecision aiming and low light visibility.1

RangingMOA measurements are very effective for rangingusing a simple formula. To use this formula, theshooter needs to know the size of the target or nearbyobject in inches.ExampleMOA Ranging FormulaTarget Size (Inches) x 95.5Measured MOAs=Range (Yards)Using either the vertical or horizontal MOA scale,place the reticle on a target of known dimensions andread the number of MOAs spanned. You will obtainmaximum accuracy in ranging by calculating exactMOA measurements. MOAs should be estimated in1/4s if possible.Accurate measuring will depend on a very steadyhold. The rifle should be solidly braced using a rest,bipod or sling when measuring. Once you have anaccurate MOA reading, use the formula to calculatethe distance.Ranging a man (39 inches from groin to top of head)at 6 MOAs yields 621 yards.39 x 95.5= 621 Yards6 MOANote: In the MOA ranging formula, a shooter may substitute 100 for95.5 in the interest of speedier calculations. Be aware that this willproduce a fi ve percent over-estimation error of the yardage distanceobtained.4 5

Elevation HoldoversOnce the distance has been calculated using theEBR-1 MOA reticle or a laser rangefinder, the EBR-1can be used for rapid holdover correction for bulletdrop of the cartridge being used. To get the mostbenefit out of the EBR-1 equipped riflescope, VortexOptics highly recommends shooters learn theirbullet drop numbers in MOAs rather than inches.ExampleSince the EBR-1 reticle is scaled in 1 MOAincrements, it is an easy job to quickly select thecorrect drop reference line once the shooter knowsthe bullet drops in MOAs. If the shooter prefers todial come ups for bullet drop using the elevationknob, knowing bullet drops in MOAs rather thaninches will allow for much faster adjustments as theMOAs can be quickly read on the elevation knob.7 MOA reticle holdover for 400-yard shot. No wind.6 7

Windage and Moving TargetsThe EBR-1 MOA reticle is highly effective whenused for wind and moving target leads. Usingthe reticle for effective windage and movingtarget leads will require thorough knowledgeof your weapons system’s ballistic performanceunder varying conditions and experience inreading wind strengths and target speeds. Asin bullet drops, it is important for the shooterto learn a particular weapon’s windage/movingtarget corrections in MOAs rather than inches.Always hold the reticle into the wind.Example10 mph windFull value wind at 90 degreesBasic windage correction on center crosshairWhen dialing elevation come ups, the centerhorizontal crosshair will be used for windage ormoving lead corrections.3 MOA reticle windage correction for 400-yard shot in 10 mphcrosswind using center crosshair. Elevation adjustment already dialedinto rifl escope.8 9

Basic windage correction using drop line on reticleWhen using the reticle for elevation correction rather thandialing, the MOA marks on the center horizontal crosshaircan still be used to help visually reference windagecorrections. Remember to hold the reticle into the wind.ExampleBasic moving lead correctionWhen estimating moving target leads, the MOA markson the center horizontal crosshair can be used. Estimatingmoving target leads will require knowing yardage distance,wind speed, moving target speed, and total bullet flight time(including rifle lock time). Bullet flight times can be roughlycalculated based on fps velocities or a ballistic calculator.Note: Correctly estimating moving leads is very diffi cult and requiresconsiderable practice and knowledge beyond the scope of this manual.Example20 mph windFull value wind at 90 degreesWalking Direction8 MOA reticle windage correction for 500-yard shot in 20 mphcrosswind using 10 MOA reticle drop line.9.4 MOA reticle correction for a man walking 3 mph at a distance of800 yards. No wind. Total bullet time of fl ight from trigger pull 1.5seconds during which man travels 6.6 feet. Elevation already dialedinto turret.10 11

Vortex Service and Repair Policyvortexoptics.comUnconditional Lifetime WarrantyVortex Optics wants you to shootand use your Viper PST riflescopeunder any conditions withcomplete confidence—that’s whyour warranty is straightforwardand simple:• Fully transferableUnconditional LifetimeWarranty• No warranty card needed• No receipt neededRest assured, if this riflescope should ever require repair, allyou need to do is contact Vortex for absolutely free service.Call 800-426-0048 or e-mail service@vortexoptics.com.Vortex Optics2120 West Greenview DriveMiddleton, Wisconsin 53562USAPatent PendingDual Use: Shooting Tactical / HuntingManual #R-624S1-A12