New Norma Primed 5.56 Brass

$ 19.50

4.8 (497) In stock

New Norma Primed 5.56 Brass
Norma%20Primed%205.56x45mm%20Rifle%20Brass.%20This%20is%20brand%20new%20brass%20available%20in%20100ct%2C%20500ct%2C%201000ct%2C%201000ct%20in%20an%20ammo%20can%2C%205%2C000ct%2C%20and%2010%2C000%20ct%0AThis%20primed%205.56mm%20brass%20does%20not%20have%20staked%20primers%20(i.e.%20this%20is%20NOT%20crimped).%0AOur%20Norma%20Primed%205.56x45mm%20NATO%20brass%20cartridges%20are%20of%20very%20high%20quality%20and%20incredbile%20value.%26nbsp%3B%0AShortly%20after%20the%20introduction%20of%20the%20.222%20Remington%2C%20experiments%20began%20to%20make%20a%20similar%20cartridge%20for%20military%20use.%20That%20cartridge%20eventually%20became%20the%205.56x45mm%20NATO.%20The%20first%20.223%20appeared%20in%201957%20and%20was%20mainly%20the%20work%20of%20Robert%20Hutton%20of%20Guns%20%26amp%3B%20Ammo%20and%20Gene%20Stoner%20of%20Armalite.%20One%20of%20the%20requirements%20for%20the%20new%20cartridge%20was%20that%20it%20could%20retain%20a%20velocity%20exceeding%20the%20speed%20of%20sound%20at%20500%20yards.%20This%20was%20not%20possible%20with%20the%20.222%2C%20but%20with%20its%20slightly%20longer%20case%20and%20a%2055%20grains%20boattail%20bullet%20the%20.223%20met%20the%20demands.%20The%20cartridge%20was%20adopted%20by%20the%20U.S.%20Army%20in%201964%20and%20used%20in%20the%20Vietnam%20war.%20Since%20then%20it%20has%20been%20adopted%20by%20NATO%20as%20a%20standard%20military%20cartridge.%0AThe%20dimensions%20of%20military%20chambers%20and%20cartridges%20vary%20slightly%20from%20the%20sporting%20version%20that%20was%20brought%20out%20by%20Remington%20shortly%20after%20the%20.223%20was%20adopted%20by%20the%20military.%20Accordingly%20military%20ammunition%20might%20produce%20high%20chamber%20pressure%20in%20sporting%20rifles.%20Military%20cases%20quite%20often%20has%20thicker%20brass%20and%20starting%20loads%20must%20be%20reduced%20by%20at%20least%2010%20per%20cent.%0AFor%20sporting%20purposes%20the%20cartridge%20is%20normally%20at%20its%20best%20using%20bullets%20of%2060%20grains%20or%20less.%20It%20is%20suitable%20for%20the%20same%20range%20of%20purposes%20as%20.222%20Remington%2C%20and%20will%20add%20some%20yards%20to%20the%20effective%20range.%26nbsp%3B%0ACase%20weights%20(measured%20with%20primer)%3A%0AStandard%20Deviation%2C%20%26sigma%3B%3A%26nbsp%3B0.28565227501671%0A%0A%0A%0ACount%2C%20N%3A%0A24%0A%0A%0ASum%2C%20%26Sigma%3Bx%3A%0A2499.4%0A%0A%0AMean%2C%20%26mu%3B%3A%0A104.14166666667%0A%0A%0AVariance%2C%20%26sigma%3B2%3A%26nbsp%3B%0A0.081597222222222