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  2. Comparison of commercial battery types - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_commercial...

    4 NiCd vs. NiMH vs. Li-ion vs. Li–polymer vs. LTO. 5 See also. 6 References. Toggle the table of contents. Comparison of commercial battery types. 4 languages.

  3. Hollow-point bullet - Wikipedia

    en.wikipedia.org/wiki/Hollow-point_bullet

    After announcing consideration of using hollow point ammunition for side arms, with a possible start date of 2018, [10] the United States Army began production of M1153 special purpose ammunition for the 9×19mm Parabellum with a 147-grain (9.5 g) jacketed hollow point bullet at 962 feet (293 m) per second for use in situations where limited ...

  4. Overpressure ammunition - Wikipedia

    en.wikipedia.org/wiki/Overpressure_ammunition

    Speer Gold Dot 124gr 9mm+P in SIG P226 magazines. Overpressure ammunition, commonly designated as +P or +P+ (pronounced Plus-P or Plus-P-Plus), is small arms ammunition that has been loaded to produce a higher internal pressure when fired than is standard for ammunition of its caliber (see internal ballistics), but less than the pressures generated by a proof round.

  5. 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 ...

  6. 23×115mm - Wikipedia

    en.wikipedia.org/wiki/23×115mm

    The round was derived from the 14.5×114mm round by necking it out to 23 mm. [1] The original rounds used a lower power charge of 33 g of sw 4/7 powder and achieved 690 m/s at a maximum pressure of 294.3 MPa. In 1954 an improved ammunition was introduced, featuring better projectile design and ballistic properties.

  7. 9×25mm Dillon - Wikipedia

    en.wikipedia.org/wiki/9×25mm_Dillon

    There, a 115 only needs to be going a bit over 1,500 ft/s to qualify for major power factor. Competitors in the late 1980s and early 1990s who were using the 9×25mm Dillon used the additional powder available over .38 Super to produce more gas in the compensator, or muzzle brake , to make pistols shoot with as little muzzle rise as possible to ...

  8. Grain size - Wikipedia

    en.wikipedia.org/wiki/Grain_size

    Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials . This is different from the crystallite size, which refers to the size of a single crystal inside a particle or grain.

  9. .38 Special - Wikipedia

    en.wikipedia.org/wiki/.38_Special

    Issued only by the U.S. Air Force, the PGU-12/B had a greatly increased maximum allowable pressure rating of 20,000 psi, sufficient to propel a 130-grain FMJ bullet at 1,125 ft/s (343 m/s) from a solid 6-inch (150 mm) test barrel, and about 950–1,000 ft/s from a 4-inch (100 mm) revolver barrel. [19]