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In this instance, heavier bullets are loaded in standard ammunition, which reduces muzzle velocity below the speed of sound. As an example, the very common 9×19mm Parabellum standard military round is a 7.5 g (116 gr) bullet at velocities typically around 360 m/s (1,200 ft/s). Subsonic loads for 9×19mm Parabellum commonly use 9.5 g (147 gr ...
In basketball statistics, Offensive Efficiency Rating (OER) is the average number of points scored by a basketball player per shot taken. This includes missed field goals as well as free throws. The statistic stems from the previously created Player Efficiency Rating (PER). The per-minute rating was created by John Hollinger. Hollinger states ...
The 9×39 is based on the Soviet 7.62×39mm case but with the neck expanded to fit a 9.2mm bullet. The final design was completed by N. Zabelin, L. Dvoryaninova, and Y. Frolov of the TsNIITochMash in the 1980s.
Since the mass of the bullet is much less than that of the shooter there is more kinetic energy transferred to the bullet than to the shooter. Once discharged from the weapon, the bullet's energy decays throughout its flight, until the remainder is dissipated by colliding with a target (e.g. deforming the bullet and target).
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The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). [2] It features a Gatling-style rotating barrel assembly with an external power source, normally an electric motor.
The ground surface is a frequent source of ricochets. A bullet may be deflected more than once before it comes to rest. [17] Damage potential of ricochets, like bullets, is proportional to the mass of the bullet fragment and the square of its velocity. Ricochet velocity is always lower than collision velocity, but may be close to collision ...