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  2. Miller twist rule - Wikipedia

    en.wikipedia.org/wiki/Miller_twist_rule

    Miller twist rule is a mathematical formula derived by American physical chemist and historian of science Donald G. Miller (1927-2012) to determine the rate of twist to apply to a given bullet to provide optimum stability using a rifled barrel. [1]

  3. Power factor (shooting sports) - Wikipedia

    en.wikipedia.org/wiki/Power_factor_(shooting_sports)

    In both the open and standard rifle divisions, minor power factor is dominating due to less recoil, and 5.56×45mm/ .223 Rem is a common caliber. Ammunition loaded to major power factor such as 7.62×51 mm/ .308 Win has a bigger recoil impulse, and is regarded as having an advantage on stages with targets at long range.

  4. Free recoil - Wikipedia

    en.wikipedia.org/wiki/Free_recoil

    The rearward energy of the firearm is the free recoil and the forward energy of the bullet is the muzzle energy. The concept of free recoil comes from the tolerability of gross recoil energy. Trying to figure the net recoil energy of a firearm (also known as felt recoil) is a futile endeavor. Even if the recoil energy loss can be calculated ...

  5. Recoil - Wikipedia

    en.wikipedia.org/wiki/Recoil

    The following are base examples calculated through the Handloads.com free online calculator, and bullet and firearm data from respective reloading manuals (of medium/common loads) and manufacturer specifications: In a Glock 22 frame, using the empty weight of 1.43 lb (0.65 kg), the following was obtained:

  6. Wash-sale rule: What to avoid when selling your losing ... - AOL

    www.aol.com/finance/wash-sale-rule-avoid-selling...

    The wash-sale rule applies to both you and a spouse as if you were a unit. For example, you may not claim a loss while your spouse re-buys the asset within the 30-day window. This rule also ...

  7. Hydraulic recoil mechanism - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_recoil_mechanism

    Diagram of recoil mechanism, British 60-pounder gun Mk.I, 1916. The idea of using a water brake to counteract the recoil of naval cannons was first suggested to the British Admiralty by Carl Wilhelm Siemens in early 1870s, but it took about a decade for other people (primarily Josiah Vavasseur) to commercialize the idea. [1]

  8. Bump stock - Wikipedia

    en.wikipedia.org/wiki/Bump_stock

    Since the bump-stock-type devices covered by this final rule were not in existence prior to 1986, they would be prohibited when the rule becomes effective. [26] The ban went into effect on March 26, 2019, by which owners of bump stocks were required to destroy or surrender them to the ATF, punishable by up to a $250,000 fine and/or prison ...

  9. Rifleman's rule - Wikipedia

    en.wikipedia.org/wiki/Rifleman's_rule

    Rifleman's rule is a "rule of thumb" that allows a rifleman to accurately fire a rifle that has been calibrated for horizontal targets at uphill or downhill targets. The rule says that only the horizontal range should be considered when adjusting a sight or performing hold-over in order to account for bullet drop.