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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ackley Improved vs Parent Case
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<blockquote data-quote="J E Custom" data-source="post: 633553" data-attributes="member: 2736"><p>The main reason to use a ''improved''case is to increase the powder capacity. This allows the use </p><p>of slower burning powder lowering the pressure by volume. when you go to slower powder you </p><p>can add more to reach the same pressure with more volume of gas increasing the velocity.</p><p></p><p>With a short barrel there is no real advantage but when you increase the volume it is advantages</p><p>to use a longer barrel to help consume the slower powder.</p><p></p><p>So theoretically if all things are equal (Pressure, bullet weight, barrel length,twist rate ETC) velocity</p><p>will be very close to the same. and adding barrel length to smaller capacity cases with fast burning</p><p>powder will not get you much gain, but increase the case capacity and the charge of slower burning</p><p>powder along with a longer barrel and the gains will be noticeable.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 633553, member: 2736"] The main reason to use a ''improved''case is to increase the powder capacity. This allows the use of slower burning powder lowering the pressure by volume. when you go to slower powder you can add more to reach the same pressure with more volume of gas increasing the velocity. With a short barrel there is no real advantage but when you increase the volume it is advantages to use a longer barrel to help consume the slower powder. So theoretically if all things are equal (Pressure, bullet weight, barrel length,twist rate ETC) velocity will be very close to the same. and adding barrel length to smaller capacity cases with fast burning powder will not get you much gain, but increase the case capacity and the charge of slower burning powder along with a longer barrel and the gains will be noticeable. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Ackley Improved vs Parent Case
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