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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
What was the original powder used in AR-15/M-16?
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<blockquote data-quote="M1A1ABRAMS" data-source="post: 3005461" data-attributes="member: 123811"><p>I did find this,you may find interesting ?</p><p>After a visit to Fort Benning, Stoner begins to tweak the .222 Remington round to fit the Infantry Board's penetration requirements. First, Stoner and Sierra's Frank Snow modify the .224″ 68 grain "M1 ball homologue" to 55 grains by shortening the bearing length and the boattail, while maintaining the original 7-caliber ogive and 9-degree boattail. The new projectile is also produced by Sierra. Robert Hutton uses Speer's Ballistic Calculator to estimate the muzzle velocity need to provide the desired performance at 500 yards. The results indicate a muzzle velocity of 3,300 fps with the 55 grain bullet will be required. Hutton begins load development with IMR 4198, IMR 3031, and an unnamed Olin ball powder. Using a Remington Model 722 with a 22″ Apex bull barrel and a Lyman 25x scope, Hutton successfully perforates US helmets at 500 yards during a public demonstration. However, testing also indicates that the .222 Remington cannot achieve the required velocity without excessive chamber pressure. Stoner contacts Winchester and Remington about increasing the case capacity; Remington accepts the request. (This refusal is hardly surprising since Winchester had their own SCHV rifle and cartridge in the works.) The resulting cartridge is designated the .222 Special.</p><p></p><p></p><p></p><p>[URL unfurl="true"]https://looserounds.com/556timeline/[/URL]</p></blockquote><p></p>
[QUOTE="M1A1ABRAMS, post: 3005461, member: 123811"] I did find this,you may find interesting ? After a visit to Fort Benning, Stoner begins to tweak the .222 Remington round to fit the Infantry Board's penetration requirements. First, Stoner and Sierra's Frank Snow modify the .224″ 68 grain "M1 ball homologue" to 55 grains by shortening the bearing length and the boattail, while maintaining the original 7-caliber ogive and 9-degree boattail. The new projectile is also produced by Sierra. Robert Hutton uses Speer's Ballistic Calculator to estimate the muzzle velocity need to provide the desired performance at 500 yards. The results indicate a muzzle velocity of 3,300 fps with the 55 grain bullet will be required. Hutton begins load development with IMR 4198, IMR 3031, and an unnamed Olin ball powder. Using a Remington Model 722 with a 22″ Apex bull barrel and a Lyman 25x scope, Hutton successfully perforates US helmets at 500 yards during a public demonstration. However, testing also indicates that the .222 Remington cannot achieve the required velocity without excessive chamber pressure. Stoner contacts Winchester and Remington about increasing the case capacity; Remington accepts the request. (This refusal is hardly surprising since Winchester had their own SCHV rifle and cartridge in the works.) The resulting cartridge is designated the .222 Special. [URL unfurl="true"]https://looserounds.com/556timeline/[/URL] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
What was the original powder used in AR-15/M-16?
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