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A ballistic chronograph or gun chronograph is a measuring instrument used to measure the velocity of a projectile in flight, typically fired from a gun or other firearm. The instrument is often useful for tasks such as gauging the utility of a firearm or safety of non-lethal projectiles fired from items such as a paintball gun or BB gun .
Power factor (PF) in practical shooting competitions refers to a ranking system used to reward cartridges with more recoil. Power factor is a measure of the momentum of the bullet (scaled product of the bullet's mass and velocity), which to some degree reflects the recoil impulse from the firearm onto the shooter (see section on limitations).
The Taylor KO factor multiplies bullet mass (measured in grains) by muzzle velocity (measured in feet per second) by bullet diameter (measured in inches) and then divides the product by 7,000, converting the value from grains to pounds and giving a numerical value from 0 to ~150 for normal hunting cartridges.
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The Aberdeen chronograph was the first portable gun chronograph, an instrument for measuring the muzzle velocity and striking power of a projectile fired by a gun. It was invented in 1918 by Alfred Lee Loomis at the U.S. Army's Aberdeen Proving Ground .
[174] As a result, the milled AK-47s are capable of shooting 3–5 inch groups at 100 yards, whereas the stamped AKMs are capable of shooting 4–6 inch groups at 100 yards. [ 130 ] [ 174 ] The best shooters can hit a man-sized target at 800 meters within five shots (firing from a prone or supported position) or ten shots (standing).
The ISSF World Cup was introduced by the International Shooting Sport Federation in 1986 to provide a homogeneous system for qualification to the Olympic shooting competitions. It still is carried out in the Olympic shooting events, with four competitions per year in each event. For the best shooters there is since 1988 a World Cup Final.
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