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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.Gun-launched projectiles may be unpowered, deriving all their velocity from the propellant's ignition until the projectile exits the gun barrel. However, exterior ballistics analysis also deals with the trajectories of rocket-assisted gun-launched projectiles and gun-launched rockets; and rockets that acquire all their trajectory velocity from the interior ballistics of their on-board propulsion system, either a rocket motor or air-breathing engine, both during their boost phase and after motor burnout. External ballistics is also concerned with the free-flight of other projectiles, such as balls, arrows etc.

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  1. G8rHunter

    Do I Really Need a Bullet Drop Compensator for My Scope?

    I purchased a Leupold vx 3i 3.5x10x40mm scope and got the wrong model number, without the CDS feature. I bought it on Amazon. I am sure I can return it. However, is the CDS feature that good to warrant sending the scope back to get the CDS? Or is it that important? Thoughts? BTW, I am planning...
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