Angle 10° 20° 30° 40° 50° 60° 70° 80° 90° COS .98 .94 .85 .75 .65 .50 .35 .20 .0 Formulas ( 7.62mm, 175gr @ 2600 fps ) Constant 100 - 500 yds 600 yrd 700 - 800 yrds 900 yrds 1000 yrds = 53 = 49 = 46 = 42 = 39 .25 mil per 100yds @10mph Simple Method Angle = MPH 4 60 = 15 4 Wind Effects Humidity Effects Humidity up = impact down Humidity down = impact up Rule of Thumb: 20% = ~1moa affect on POI Range (100s) x Velocity (mph) = MILS 0-3 3-5 5-8 8-12 12-15 15-20 Hardly felt on face Lightly felt on face Tree leaves in motion Raises dust and paper Small trees sway Larger trees sway Yards M/Yd Meters 1.0936 1 0.9144 Target Sz Inches x 27.77 = YARDS Mil Reading of Target GAP Reticle (not to scale) Slope Dope MIL MIL/MOA MOA 1.00 1 3.4 38 Common Measurements Exterior Door 55gal Barrel 5gal Bucket Cinder Block = 36" x 80" = 12" x 15" = 12" x 8" = 8" x 2" License Plate Door Knob = 3" = 12" x 6" Formulas Angle 10° 20° 30° 40° 50° 60° 70° 80° 90° COS .98 .94 .85 .75 .65 .50 .35 .20 .0 ( 7.62mm, 175gr @ 2600 fps ) Constant 100 - 500 yds 600 yrd 700 - 800 yrds 900 yrds 1000 yrds = 53 = 49 = 46 = 42 = 39 .25 mil per 100yds @10mph Simple Method Angle = MPH 4 60 = 15 4 Wind Effects Humidity Effects Humidity up = impact down Humidity down = impact up Rule of Thumb: 20% = ~1moa affect on POI Range (100s) x Velocity (mph) = MILS 0-3 3-5 5-8 8-12 12-15 15-20 Hardly felt on face Lightly felt on face Tree leaves in motion Raises dust and paper Small trees sway Larger trees sway Yards M/Yd Meters 1.0936 1 0.9144 Target Sz Inches x 27.77 = YARDS Mil Reading of Target GAP Reticle (not to scale) Slope Dope MIL MIL/MOA MOA 1.00 1 3.4 38 Common Measurements Exterior Door 55gal Barrel 5gal Bucket Cinder Block = 36" x 80" = 12" x 15" = 12" x 8" = 8" x 2" License Plate Door Knob = 3" = 12" x 6"