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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ackley Improved
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<blockquote data-quote="Trickymissfit" data-source="post: 559463" data-attributes="member: 25383"><p>Parker Ackley usually improved cases to aid in case life more than anything else. Velocity gains were just something that was added into the equation. Many didn't see a lot if any real gain in velocity (30-06AI comes to light), and some saw big jumps, as in the 22-250AI. Yet something like a .338-06AI did see an inprovement that was greater than the samething in 30 caliber. Guess it was the ability to use the extra powder capacity more efficently</p><p> </p><p>The down side to the 40 degree shoulder is the dreaded doughnut forming at the shoulder/neck junction. A 30 or even a 35 degree shoulder had less of a problem. I shoot the 6/250AI, and see the doughnut after about four firings.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 559463, member: 25383"] Parker Ackley usually improved cases to aid in case life more than anything else. Velocity gains were just something that was added into the equation. Many didn't see a lot if any real gain in velocity (30-06AI comes to light), and some saw big jumps, as in the 22-250AI. Yet something like a .338-06AI did see an inprovement that was greater than the samething in 30 caliber. Guess it was the ability to use the extra powder capacity more efficently The down side to the 40 degree shoulder is the dreaded doughnut forming at the shoulder/neck junction. A 30 or even a 35 degree shoulder had less of a problem. I shoot the 6/250AI, and see the doughnut after about four firings. gary [/QUOTE]
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