Ballistic solution Example: Calculation

Preparation Sgt McShooty is deployed as a Spotter (Manual) on a Honeybadger. He aims for to be able to assemble a ballistic solution in any conditions, so he prepares calculations for the operation. His sniper is using the M24 SWS and they will only be using the M118 LR bullet. Prior to operation start, he looks at an ATragMX to record time of flight for his given atmospherics. Target Range Time of Flight 400m 0.61s 500m 0.79s 600m 0.99s 700m 1.20s 800m 1.43s 900m 1.68s 1000m 1.95s Target Requirements In operation, Sgt McShooty identifies an OPFOR machine gunner engaging a friendly squad. A follow up shot will not compromise any objectives, so he can disregard most Tertiary Components entirely. In addition to this, he is presented with fairly typical shot conditions, as: There is no wind present The target is stationary while firing He is not firing at a steep incline Category Ballistic Component Direction of Deflection Primary Bullet Drop (composite) Vertical Primary Moving Targets Horizontal Primary Crosswinds Horizontal Secondary Inclined Shooting Vertical Secondary Spin Drift Horizontal Secondary Coriolis Effect Horizontal Tertiary Eotvös Effect Vertical Tertiary Headwinds & Tailwinds Vertical Tertiary Air Density changes Vertical Ballistic Solution Assembly Bullet Drop Sgt McShooty ranges his target at 800m according to https://unitedtaskforce.net/handbook?c=marksmanship-temp&g=FMG83. Looking at his range card, he finds a bullet drop adjustment of 9.1 mils. Spin Drift He uses the Spin Drift formula to calculate horizontal deflection according to https://unitedtaskforce.net/handbook/block/558/spin-drift-calculation: ((SG * Time of Flight ^ 1.83) / Distance) * 1000 = Spin Drift in MRADs ((.0759 * 1.43 ^ 1.83) / 800) * 1000 = .18 MRADs Because his barrel twist is right hand, his bullet will deflect .18 MRADs to the right. Coriolis Effect He uses the Horizontal Coriolis Effect formula to calculate horizontal deflection according to https://unitedtaskforce.net/handbook/block/553/horizontal-coriolis-force-calculation: cos(latitude°) * (Time of flight in seconds) * .072 = Horizontal deflection in MRADs cos(35°) * (1.43) * .072 = .08 MRADs to the Right Final Ballistic Solution Sgt McShooty adds his two horizontal components together for a total of .26 MRADs to the right. Because his deflection is low and to the left, he tells his sniper to adjust up and to the right Final Ballistic Solution: 9.1 mils up, 0.26 mils left