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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ackley Improved
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<blockquote data-quote="J E Custom" data-source="post: 688213" data-attributes="member: 2736"><p>The idea of the AI (Improved cartrige)is to up the performance in any cartrige with out having </p><p>to make major changes in the rifle. And if set up right, be able to fire both the parent ammo</p><p>and the Improved ammo in the same rifle.</p><p></p><p>Example: If you build/buy a rifle in 280 remington and have it rechambered in 280 AI and use </p><p>the same head space gauge, You can fire eather round in it using the rifle as is because the </p><p>rails,follower,bolt face and extractor remain the same.</p><p></p><p>The ballistics of the 280 AI are 100 to 200 ft/sec faster using the same bullet in the 280 Rem.</p><p></p><p>With the lighter bullets the 280 AI will approach the 7mm Rem Mag velocities. (But not with the </p><p>heaviest 7 mm bullets).</p><p></p><p>If you went from a 280 Rem to a 7mm Rem Mag the bolt face would have to be enlarged, a new</p><p>extractor would have to be installed, the mag follower should be changed and the action rails</p><p>would have to be opened up, plus a total rechambering. Also you would go from a shouldered </p><p>head spaced case to a belted case. (Sizing requirements are somewhat different between the two</p><p>case types.</p><p></p><p>The other thing about doing an Improved chamber is improved brass life.</p><p></p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 688213, member: 2736"] The idea of the AI (Improved cartrige)is to up the performance in any cartrige with out having to make major changes in the rifle. And if set up right, be able to fire both the parent ammo and the Improved ammo in the same rifle. Example: If you build/buy a rifle in 280 remington and have it rechambered in 280 AI and use the same head space gauge, You can fire eather round in it using the rifle as is because the rails,follower,bolt face and extractor remain the same. The ballistics of the 280 AI are 100 to 200 ft/sec faster using the same bullet in the 280 Rem. With the lighter bullets the 280 AI will approach the 7mm Rem Mag velocities. (But not with the heaviest 7 mm bullets). If you went from a 280 Rem to a 7mm Rem Mag the bolt face would have to be enlarged, a new extractor would have to be installed, the mag follower should be changed and the action rails would have to be opened up, plus a total rechambering. Also you would go from a shouldered head spaced case to a belted case. (Sizing requirements are somewhat different between the two case types. The other thing about doing an Improved chamber is improved brass life. J E CUSTOM [/QUOTE]
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Ackley Improved
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