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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cooper 280AI Chamber question.
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<blockquote data-quote="Ridgerunner665" data-source="post: 1001142" data-attributes="member: 12660"><p>Retumbo is too slow for the Ackley....even with 180 grain bullets....the loads using it may be accurate, but they are slower than loads using faster powders.</p><p></p><p>IMR 7828ssc, MRP, and Reloder 22 are the ideal powders for the 280 Ackley...Reloder 25 is the absolute slowest powder that has any place in a 280 Ackley with a standard SAAMI throat....and Retumbo is too slow even with a long throat....a 28" barrel might make Retumbo worthwhile also.</p><p></p><p>That may upset some folks...but its true.</p><p></p><p>Get some 7828, MRP, or RL 22 and you'll have plenty of room...and just as much speed and accuracy, probably more even.</p></blockquote><p></p>
[QUOTE="Ridgerunner665, post: 1001142, member: 12660"] Retumbo is too slow for the Ackley....even with 180 grain bullets....the loads using it may be accurate, but they are slower than loads using faster powders. IMR 7828ssc, MRP, and Reloder 22 are the ideal powders for the 280 Ackley...Reloder 25 is the absolute slowest powder that has any place in a 280 Ackley with a standard SAAMI throat....and Retumbo is too slow even with a long throat....a 28" barrel might make Retumbo worthwhile also. That may upset some folks...but its true. Get some 7828, MRP, or RL 22 and you'll have plenty of room...and just as much speed and accuracy, probably more even. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cooper 280AI Chamber question.
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