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Hunting
Long Range Hunting & Shooting
257 caliber question
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<blockquote data-quote="357Mag" data-source="post: 1715664" data-attributes="member: 106883"><p>Gibb -</p><p></p><p>Howdy !</p><p></p><p>Review of each case' spec's shows that the .250 Ackley improved has a 40* shoulder angle and nominal .455" shoulder diam.</p><p></p><p>A notional .250 Creedmoor would have a 30* shoulder angle and around the same shoulder diam as what the .250AI has.</p><p></p><p>The .25 Creedmoor ( I believe ) would have a slightly longer base-to-shoulder dimension than what the .250AI has.</p><p></p><p>Tthe powder storage area covered by the .25 Creedmoor would be slightly larger than that seen on the .250AI ( owing to the former's shallower shoulder angle ).</p><p>That fact added to the .25 Creedmoor's slightly longer base-to-shoulder dimension would result in it having a tad more case capacity that the .250AI ( IMHO ).</p><p></p><p>Case oal's are very close. </p><p></p><p>Brass preference would possibly bias one's decision ....one way or the other.</p><p></p><p></p><p>With regards,</p><p> 357Mag</p></blockquote><p></p>
[QUOTE="357Mag, post: 1715664, member: 106883"] Gibb - Howdy ! Review of each case' spec's shows that the .250 Ackley improved has a 40* shoulder angle and nominal .455" shoulder diam. A notional .250 Creedmoor would have a 30* shoulder angle and around the same shoulder diam as what the .250AI has. The .25 Creedmoor ( I believe ) would have a slightly longer base-to-shoulder dimension than what the .250AI has. Tthe powder storage area covered by the .25 Creedmoor would be slightly larger than that seen on the .250AI ( owing to the former's shallower shoulder angle ). That fact added to the .25 Creedmoor's slightly longer base-to-shoulder dimension would result in it having a tad more case capacity that the .250AI ( IMHO ). Case oal's are very close. Brass preference would possibly bias one's decision ....one way or the other. With regards, 357Mag [/QUOTE]
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