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A typical 4.5 mm (.177 in) 10 m air rifle match pellet. For the 10-meter air rifle and air pistol disciplines, match-grade diabolo pellets are used. These pellets are wadcutter, meaning the pellet head is nearly completely flat. This leaves smooth-edged round holes in paper targets and allows easy gauging for scoring. Match pellets are offered ...
The air reservoir was in the club-shaped stock. With a full air reservoir, the Girardoni air rifle had the capacity to shoot 30 shots at useful pressure. These balls were effective to approximately 125 yd (114 m) on a full air reservoir. The power declined as the air reservoir was emptied. [12]
"HW 77" (Full-length rifle, 470mm barrel length) "HW 77 K" (Carbine, 370mm barrel length) "HW 77 and HW 77 K Special Edition" (Brown/green/black laminated wood stock) The main variant of the HW 77 is the HW 77 K carbine. [2] The K signifies ‘Kurz’ [3] which is the German word for 'Short'. The HW 77 K weighs approximately 100 grams less than ...
External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight. The projectile may be powered or un-powered, guided or unguided, spin or fin stabilized, flying through an atmosphere or in the vacuum of space, but most certainly flying under the influence of a gravitational field.
Rifleman's rule is a "rule of thumb" that allows a rifleman to accurately fire a rifle that has been calibrated for horizontal targets at uphill or downhill targets. The rule says that only the horizontal range should be considered when adjusting a sight or performing hold-over in order to account for bullet drop.
In ballistics, the ballistic coefficient (BC, C b) of a body is a measure of its ability to overcome air resistance in flight. [1] It is inversely proportional to the negative acceleration: a high number indicates a low negative acceleration—the drag on the body is small in proportion to its mass.
Miller twist rule is a mathematical formula derived by American physical chemist and historian of science Donald G. Miller (1927-2012) to determine the rate of twist to apply to a given bullet to provide optimum stability using a rifled barrel. [1]
This is an important consideration in locations where air guns are legally restricted by muzzle energy. Because a .177 pellet is lighter than a larger caliber pellet of similar design, the .177 pellet can be propelled faster and therefore on a flatter trajectory , without exceeding the legal limit on energy.