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  2. Gun serial number - Wikipedia

    en.wikipedia.org/wiki/Gun_serial_number

    A gun serial number is a unique identifier assigned to a singular firearm. [A] There is no international uniformity in gun serial numbers. Besides a widespread numerical base, they may contain letters and other typographical symbols, or may consist entirely of a character string; positioning and form of such identifiers is idiosyncratic. [1] [3]

  3. Circular error probable - Wikipedia

    en.wikipedia.org/wiki/Circular_error_probable

    The relation between and are given by the following table, where the values for DRMS and 2DRMS (twice the distance root mean square) are specific to the Rayleigh distribution and are found numerically, while the CEP, R95 (95% radius) and R99.7 (99.7% radius) values are defined based on the 68–95–99.7 rule

  4. Miller twist rule - Wikipedia

    en.wikipedia.org/wiki/Miller_twist_rule

    When computing using this formula, Miller suggests several safe values that can be used for some of the more difficult to determine variables. For example, he states that a mach number of M {\displaystyle M} = 2.5 (roughly 2800 ft/sec, assuming standard conditions at sea level where 1 Mach is roughly 1116 ft/sec) is a safe value to use for ...

  5. How to Find Out Who Owns a Gun Permit: Learn If Your ... - AOL

    www.aol.com/news/2012-12-28-how-to-find-out-who...

    The only gun registries that do exist are state registries. Only a minority of states have them, however, since most states do not require residents to obtain a permit to purchase a firearm.

  6. Forensic firearm examination - Wikipedia

    en.wikipedia.org/wiki/Forensic_firearm_examination

    After test firing the guns, Goddard proved that the weapons were those used to kill the members of the North Side Gang, absolving the Chicago police department of all involvement. [12] The successful use of Goddard's technique resulted in the solidification of his place as the father of forensic firearm examination.

  7. Guns at Home: Do Neighborhoods' Firearms Permits Lower ... - AOL

    www.aol.com/news/2013-01-16-gun-permits-home...

    The Journal News' gun map highlighting the names and addresses of gun permit owners across New ... but it has also sparked concerns regarding its effect on real estate values in such "gun ...

  8. Ballistic coefficient - Wikipedia

    en.wikipedia.org/wiki/Ballistic_coefficient

    Bashforth used rifled guns of 3 in (76 mm), 5 in (127 mm), 7 in (178 mm) and 9 in (229 mm); smooth-bore guns of similar caliber for firing spherical shot and howitzers propelled elongated projectiles having an ogival-head of ⁠1 + 1 / 2 ⁠ caliber radius. [32] [33] [29] Bashforth uses b as the variable for ballistic coefficient.

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