Check out the list below to arm yourself with the knowledge to make an informed choice. There are a few important factors to think about and consider when choosing AR-15 ammo. The resulting cartridge, which required a slightly different chamber design for safety, became known as the SS109, and was standardized by NATO for small arms use in 1979.Factors to Consider Before Buying AR-15 Ammo The Belgians at the same time put big R&D brains into a new 5.56x45mm cartridge using a 62-grain bullet with a steel core to meet NATO’s new ammo requirement to penetrate steel helmets at 600 meters. The use of M193 ball, with its traditional 55-grain FMJ bullet, continues to some extent today, largely for guns bought by Washington for overseas military aid to allies who may still be using older M16A1s.įast forward to the development by Belgian-based FN Herstal of the Minimi light machine gun in the early 1970s. 223 Rem ammo were echoed in Army publications of the 1970s such as MIL-C-9963E/F. Notably, the pressure levels published by SAAMI for the commercial. 223 Remington ammunition, although there was an evolving controversy over propellant types used during this era for the military contract. 223 Remington ammo cartridge to the Sporting Arms and Ammunition Manufacturers’ Institute, or SAAMI, the folks that publish safety, reliability, and interchangeability standards for commercial firearms and ammo, way back in 1962.Īmericans fighting in Vietnam in the 1960s and 1970s, who were using the assorted early variants of select-fire AR-15/M-16 rifles issued to them, loaded their weapons with what was termed by the military as “Cartridge, 5.56mm ball, M193.” This was simply. 223 Remington.ī ig Green submitted the brand new. 223 caliber bullet and christened this middle child offshoot the new and improved. Then, to split the difference between these two cartridges as the military tests continued, later dropped down to a 45mm length case with a shorter neck and the shoulder moved back slightly to accommodate a.
Army requirement for a light carbine, pushed the length of the case out to 47mm to increase the amount of propellant in the powder charge, resulting in rifles chambered in. To make a long story short, Remington in 1958, after moving away from the bolt-action market and working with ArmaLite to come up with a cartridge that met a pending U.S. 224 caliber (5.7mm) bullet, which led to its sale overseas as the 5.7×43. Introduced as a varmint and benchrest target round for Remington’s Model 722 bolt-action rifle, it used a bottlenecked case of some 43.2mm in length with a. The first modern rimless centerfire rifle cartridge produced for commercial use in the U.S.
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