Bushnell ET3124F User Manual - Page 28

Converting Trajectory Data To Mil Holdovers

Page 28 highlights

APPENDIX: MIL DOT RANGING & HOLDOVER EXAMPLES Example 2: Take the same size target but now the Mil reading is .75 (from crosshair intersection to bottom of first Mil Dot). Known size of target: 12"x 12" Mil Reading: .75 Mil 12 X 27.778 = 444.44 Yards .75 Mil Converting Trajectory Data to Mil Holdovers To calculate holdovers you must first obtain your round's trajectory data. Look at the ammunition manufacturer's website, in a manufacturer's brochure, or use a ballistic software program. You will need the Bullet Path data for a 100-yard zero, in hundred-yard increments. The following ballistic information example refers to the Federal .308 168-gr. BTHP Match Round and a 100-yard zero. The left column lists the cartridge's trajectory in inches at 100-yard increments. The next column contains the mil-size in inches at these same distances. Divide the trajectory by the mil size at each distance to find the holdover in Mils. 28

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32

28
Example 2:
Take the same size target but now the Mil reading is .75 (from crosshair intersection to bottom of first Mil Dot).
Known size of target: 12”x 12”
Mil Reading: .75 Mil
12 X 27.778
.75 Mil
CONVERTING TRAJECTORY DATA TO MIL HOLDOVERS
To calculate holdovers you must first obtain your round’s trajectory data. Look at the ammunition manufacturer’s website, in a
manufacturer’s brochure, or use a ballistic software program. You will need the Bullet Path data for a 100-yard zero, in hundred-yard
increments.
The following ballistic information example refers to the Federal .308 168-gr. BTHP Match Round and a 100-yard zero. The left column
lists the cartridge’s trajectory in inches at 100-yard increments. The next column contains the mil-size in inches at these same
distances. Divide the trajectory by the mil size at each distance to find the holdover in Mils.
= 444.44 Yards
APPENDIX: MIL DOT RANGING & HOLDOVER EXAMPLES