The external ballistics software program by JBM Ballistics predicts that the bullets of British high pressure . 338 Lapua Magnum cartridges using 16.2 g ( 250 gr ) Lapua LockBase B408 bullets fired at 936 m / s ( 3, 071 ft / s ) muzzle velocity under International Standard Atmosphere conditions at elevation ( air density ? = 1.1069 kg / m 3 ) and assuming a flat fire scenario ( a situation where the shooting and target positions are at equal elevation ) and a zero ( the distance at which the rifle is sighted in ) arrive at distance after approximately 6.017 seconds flight time at 251.8 m / s ( 826 ft / s ) velocity and have dropped 120.95 m ( 396.8 ft ) or in angular units 48.9 milliradian ( 168 MOA ) on their way.
