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  2. Hollow-point bullet - Wikipedia

    en.wikipedia.org/wiki/Hollow-point_bullet

    A hollow-point bullet is a type of expanding bullet which expands on impact with a soft target, transferring more or all of the projectile's energy into the target over a shorter distance. Hollow-point bullets are used for controlled penetration, where overpenetration could cause collateral damage (such as aboard an aircraft ).

  3. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    Slot screw drives have a single horizontal indentation (the slot) in the fastener head and is driven by a "common blade" or flat-bladed screwdriver.This form was the first type of screw drive to be developed, and, for centuries, it was the simplest and cheapest to make because it can just be sawed or filed.

  4. Impact driver - Wikipedia

    en.wikipedia.org/wiki/Impact_driver

    A manual impact driver (for use with hammer) with screwdriver bits and adapters An impact driver is a tool that delivers a strong, sudden rotational force and forward thrust. The force can be delivered either by striking with a hammer in the case of manual impact drivers, or mechanically in the case of powered impact drivers.

  5. Plastic-tipped bullet - Wikipedia

    en.wikipedia.org/wiki/Plastic-tipped_bullet

    Upon impact, the plastic drives into the hollow point and the bullet performs like a standard hollow-point, expanding ("mushrooming") to a larger diameter. These bullets possess the aerodynamics for longer, more accurate flights, and the in-target performance to ensure high lethality .

  6. Terminal ballistics - Wikipedia

    en.wikipedia.org/wiki/Terminal_ballistics

    For the purposes of aerodynamic efficiency, due to the hollow-point not creating drag, the tip of the hollow-point will often be tipped with a pointed polymer 'nose' which may also aid in expansion by functioning as a piston upon impact pushing the hollow point open. A copper-plated hollow-point loaded in a .44 Magnum, for example, with an ...

  7. Expanding bullet - Wikipedia

    en.wikipedia.org/wiki/Expanding_bullet

    Drawings from 1870 of a hollow point express rifle bullet before firing (1, 2) and after recovery from the game animal (3, 4, 5), showing expansion and fragmentation Leg wound by an expanding bullet. Expanding bullets, also known colloquially as dumdum bullets, are projectiles designed to expand on impact. This causes the bullet to increase in ...