Bushnell 4.5-30X50, 3.5-21X50 manual Converting Trajectory Data to Mil Holdovers

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.

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