The'effect-firing's . S . projectile had a form factor ( G7 " i " ) of 0.869, which indicates good aerodynamic efficiency and external ballistic performance for the bullet diameter.
32.
External ballistics is frequently associated with firearms, and deals with the unpowered free-flight phase of the bullet after it exits the gun barrel and before it hits the target, so it lies between transitional ballistics and terminal ballistics.
33.
In addition to a denser pattern of musket balls, the retained velocity could be higher as well, since the shrapnel shell as a whole would likely have a higher ballistic coefficient than the individual musket balls ( see external ballistics ).
34.
Some more explanation about the transient nature of a projectile's G1 BC ( it rises above or gets under a stated average value for a certain speed-range regime ) during flight can be found at the external ballistics article.
35.
Adjustable sights are designed to be adjustable for different ranges, for the effect of wind, or to compensate for varying cartridge bullet weights or propellant loadings, which alter the round's velocity and external ballistics and thus its trajectory and point of impact.
36.
The LAV-A2 project involved developing and installing an internal and external ballistic protection upgrade package for the Light Armored Vehicles, an automatic fire suppression system for the interior of the vehicle and a Generation II suspension upgrade to support the added weight of the new armor.
37.
The sharp shoulder and flat front of the Brenneke ( similar in dimensions to a wadcutter bullet ) mean that its external ballistics restrict it to short-range use, as its accuracy is similar to that of an American Foster slug while retaining the improved penetration and slug integrity of the Brenneke design.
38.
Hubble also worked as a civilian for U . S . Army at Aberdeen Proving Ground in Maryland during World War II as the Chief of the External Ballistics Branch of the Ballistics Research Laboratory during which he directed a large volume of research in exterior ballistics which increased the effective fire power of bombs and projectiles.
39.
For the 5.45?9mm AK-74, the East German "'Zeiss ZFK 4?5 "', "'1P29 "', Belorussian external ballistic behaviour of the employed projectiles, these military optical sights are intended to assist with field shooting at varying medium to longer ranges rather than precise long range shots.
40.
Note : Use of this table for estimating bullet masses for historical large-bore rifles is limited, as this table assumes the use of round ball, rather than conical bullets; for example, a typical 4 bore rifle from circa 1880 used a bullet, or sometimes slightly heavier, rather than using a 4-ounce round lead ball . ( Round balls give progressively much worse external ballistic performance than conical bullets at ranges greater than about 75 yards . ) In contrast, a 4-bore express rifle often used a bullet wrapped in paper to keep lead buildup to a minimum in the barrel.
