Liberal Forum

Blackvegetable » 27 Jun 2022, 11:43 am » wrote: ↑

27 Jun 2022, 11:43 am

Huey » 27 Jun 2022, 11:10 am » wrote: ↑

27 Jun 2022, 11:10 am

That's funny.  Every I posted has been verified by multiple citations.

Who developed the .223 round, when, and why?

ANd here is another source:The development of the cartridge, which eventually became the .223 Remington, was linked to the development of a new lightweight combat rifle. The cartridge and rifle were developed by Fairchild Industries, Remington Arms, and several engineers working toward a goal developed by U.S. Continental Army Command (CONARC). Development began in 1957. A project to create a small-caliber, high-velocity (SCHV) firearm was created. Eugene Stoner of ArmaLite was also invited to scale down the AR-10 (7.62×51mm NATO) design.[6] Winchester was also invited to participate.[7][5]CONARC ordered rifles to test. Stoner and Sierra Bullet's Frank Snow began work on the .222 Remington cartridge. Using a ballistic calculator, they determined that a 55-grain bullet would have to be fired at 3,300 ft/s to achieve the 500-yard performance necessary.[5]Robert Hutton (technical editor of Guns and Ammo magazine) started the development of a powder load to reach the 3,300 ft/s goal. He used DuPont IMR4198, IMR3031, and an Olin powder to work up loads. Testing was done with a Remington 722 rifle with a 22" Apex barrel. During a public demonstration, the round successfully penetrated the US steel helmet as required, but testing also showed chamber pressures to be too high.[7][5]Stoner contacted both Winchester and Remington about increasing the case capacity. Remington created a larger cartridge called the .222 Special. This cartridge is loaded with DuPont IMR4475 powder.[5]

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