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  2. Expanding bullet - Wikipedia

    en.wikipedia.org/wiki/Expanding_bullet

    Bullets used for medium and large game need better penetration, which means bullets designed to maintain integrity and for less expansion. [4] The velocities at which the bullets hit affect their expansion and penetration. [5] Expanding bullets are less likely to pass through the target, and if they do, they will exit at a lower velocity.

  3. Transitional ballistics - Wikipedia

    en.wikipedia.org/wiki/Transitional_ballistics

    Once the bullet exits the barrel, breaking the seal, the gases are free to move past the bullet and expand in all directions. This expansion is what gives gunfire its explosive sound (in conjunction with the sonic boom of the projectile), and is often accompanied by a bright flash as the gases combine with the oxygen in the air and finish ...

  4. Firearm propellant - Wikipedia

    en.wikipedia.org/wiki/Firearm_propellant

    Handgun propellants may reach peak pressure before the bullet leaves the cartridge case, while rifle propellants may move a bullet several inches before reaching peak pressure. [4]: 125 The motion and behavior characteristics of projectiles while under the influence of the gases produced by the propellant is known as internal ballistics. [13]

  5. Cartridge (firearms) - Wikipedia

    en.wikipedia.org/wiki/Cartridge_(firearms)

    These usually offer very little deformation or terminal performance expansion, but will occasionally yaw (turn sideways). Despite the name, an FMJ bullet typically has an exposed lead base, which is not visible in an intact cartridge. Glaser safety slug: Copper jackets filled with bird shot and covered by a crimped polymer endcap. Upon impact ...

  6. Bullet - Wikipedia

    en.wikipedia.org/wiki/Bullet

    Some bullet jackets do not extend to the front of the bullet, to aid expansion and increase lethality; these are called soft point (if the exposed lead tip is solid) or hollow point bullets (if a cavity or hole is present). Steel bullets are often plated with copper or other metals for corrosion resistance during long periods of storage.

  7. Internal ballistics - Wikipedia

    en.wikipedia.org/wiki/Internal_ballistics

    The bullet must tightly fit the bore to seal the high pressure of the burning gunpowder. This tight fit results in a large frictional force. The friction of the bullet in the bore does have a slight impact on the final velocity, but that is generally not much of a concern. Of greater concern is the heat that is generated due to the friction.

  8. Hollow-point bullet - Wikipedia

    en.wikipedia.org/wiki/Hollow-point_bullet

    The first hollow-point bullets were marketed in the late 19th century as express bullets and were hollowed out to reduce the bullet's mass and provide higher velocities. In addition to providing increased velocities, the hollow also turned out to provide significant expansion, especially when the bullets were cast in a soft lead alloy.

  9. Ballistics - Wikipedia

    en.wikipedia.org/wiki/Ballistics

    Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially weapon munitions such as bullets, unguided bombs, rockets and the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance.