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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
280 Ackley vs 7mm Rem.
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<blockquote data-quote="Clark" data-source="post: 718368" data-attributes="member: 6600"><p>Comparing cartridge performance with Quickload and Quicktarget at close to optimum powder choice and <strong>65kpsi </strong>the two get within 110 fps.</p><p>The problem is that the max practical usage of the 280AI will be ~ 67kpsi and the max practical for the 7mmRM will be ~ 71 kpsi. This is because the 7mmRM case head is stronger.</p><p>I would imagine that using loads based on real work ups that the <strong>280AI at 67kpsi would be ~ 200 fps slower than the 7mmRM at 71kpsi.</strong></p><p>That 200 fps represents 100 yards for velocity.</p><p></p><p><em>7mmT/CU ............. ...........26.1 gr H335 2330 fps -471 yards</em></p><p><em>7-30 Waters ........................30 gr W748 2456 fps -395 yards</em></p><p><em>7mmBR ..................... ......31.2 gr W748 2510 fps -360 yards</em></p><p><em>7mm IHMSA ........... ............40.2 gr Re17 2704 fps -247 yards</em></p><p><em>7mm-08 ............... ........40.6 gr IMR4895 2789 fps -198 yards</em></p><p><em>7mm-08AckleyImproved ..... ....43.6 gr Re15 2833 fps -171 yards</em></p><p><em>7x57mm ...........................44.6 gr Re15 2843 fps -165 yards</em></p><p><em>7x57mmAckleyImproved ... ......46.4 gr Re15 2873 fps -150 yards</em></p><p><em>284Win ........................50.0 gr IMR4350 2890 fps -172 yards</em></p><p><em>280Rem ...........................53.5 gr H414 2961 fps -152 yards</em></p><p><em>7mm Rem short action ultra mag 55.5 gr Re17 3015 fps -73 yards</em></p><p><em><strong>280RemAckleyImproved ....... .57 gr IMR4350 3019 fps -71 yards</strong></em></p><p><em><strong>7mmRemMag .................... ..68.2 gr Re22 3129 fps -15 yards</strong></em></p><p><em>7mmRem ultra mag ........ ....83.3 gr IMR7828 3130 fps -15 yards</em></p><p><em>7mmWeathMag ............. .......71.8 gr Re22 3170 fps +7 yards</em></p><p><em>7mmSTW ........... ..82.2 gr Ramshot Magnum 3158 fps 0 yards</em></p></blockquote><p></p>
[QUOTE="Clark, post: 718368, member: 6600"] Comparing cartridge performance with Quickload and Quicktarget at close to optimum powder choice and [b]65kpsi [/b]the two get within 110 fps. The problem is that the max practical usage of the 280AI will be ~ 67kpsi and the max practical for the 7mmRM will be ~ 71 kpsi. This is because the 7mmRM case head is stronger. I would imagine that using loads based on real work ups that the [b]280AI at 67kpsi would be ~ 200 fps slower than the 7mmRM at 71kpsi.[/b] That 200 fps represents 100 yards for velocity. [I]7mmT/CU ............. ...........26.1 gr H335 2330 fps -471 yards 7-30 Waters ........................30 gr W748 2456 fps -395 yards 7mmBR ..................... ......31.2 gr W748 2510 fps -360 yards 7mm IHMSA ........... ............40.2 gr Re17 2704 fps -247 yards 7mm-08 ............... ........40.6 gr IMR4895 2789 fps -198 yards 7mm-08AckleyImproved ..... ....43.6 gr Re15 2833 fps -171 yards 7x57mm ...........................44.6 gr Re15 2843 fps -165 yards 7x57mmAckleyImproved ... ......46.4 gr Re15 2873 fps -150 yards 284Win ........................50.0 gr IMR4350 2890 fps -172 yards 280Rem ...........................53.5 gr H414 2961 fps -152 yards 7mm Rem short action ultra mag 55.5 gr Re17 3015 fps -73 yards [b]280RemAckleyImproved ....... .57 gr IMR4350 3019 fps -71 yards 7mmRemMag .................... ..68.2 gr Re22 3129 fps -15 yards[/b] 7mmRem ultra mag ........ ....83.3 gr IMR7828 3130 fps -15 yards 7mmWeathMag ............. .......71.8 gr Re22 3170 fps +7 yards 7mmSTW ........... ..82.2 gr Ramshot Magnum 3158 fps 0 yards[/i] [/QUOTE]
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280 Ackley vs 7mm Rem.
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