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Long Range Hunting & Shooting
280AI. Need info
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<blockquote data-quote="J E Custom" data-source="post: 1719398" data-attributes="member: 2736"><p>This is normal when the chamber is cut like PO Ackley recommended.</p><p></p><p>If the chamber is cut .004 thousandths short, the accuracy is great while firing standard 280 ammo. Most of the guys that I have built 280 AIs for did/do what I recommended and hunt with the 280 ammo and fire form at the same time. Done this way, there is no brass prep required and the end results are fire formed cases in your chamber, with no lose of components or time. </p><p></p><p>After firing all that is recommended is to size to fit your chamber and trim to a uniform length. With the improved shoulder angle and the body taper, case growth is almost non existent.</p><p></p><p>Accuracy should be less that 1 MOA and in many cases with the right 280 ammo it has been less that 1/2 MOA while fire forming. The main advantage to the 280 AI is the increase in efficiency and case life once AI'ed. </p><p></p><p>With very little capacity increase the 280 AI will equal the 7 rem mag because of improved efficiency with most bullet weights the 280 will not, so if you want 7 mag performance the 280 must be AI'd. SAMMI Pressures should be held to the same standards because more pressure is not required for the AI to perform, and case design remains the same so more pressure is not recommended.</p><p></p><p>The 280 rem is also a great and capable cartridge and can do almost anything that the AI can.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1719398, member: 2736"] This is normal when the chamber is cut like PO Ackley recommended. If the chamber is cut .004 thousandths short, the accuracy is great while firing standard 280 ammo. Most of the guys that I have built 280 AIs for did/do what I recommended and hunt with the 280 ammo and fire form at the same time. Done this way, there is no brass prep required and the end results are fire formed cases in your chamber, with no lose of components or time. After firing all that is recommended is to size to fit your chamber and trim to a uniform length. With the improved shoulder angle and the body taper, case growth is almost non existent. Accuracy should be less that 1 MOA and in many cases with the right 280 ammo it has been less that 1/2 MOA while fire forming. The main advantage to the 280 AI is the increase in efficiency and case life once AI'ed. With very little capacity increase the 280 AI will equal the 7 rem mag because of improved efficiency with most bullet weights the 280 will not, so if you want 7 mag performance the 280 must be AI'd. SAMMI Pressures should be held to the same standards because more pressure is not required for the AI to perform, and case design remains the same so more pressure is not recommended. The 280 rem is also a great and capable cartridge and can do almost anything that the AI can. J E CUSTOM [/QUOTE]
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280AI. Need info
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