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Long Range Hunting & Shooting
300 ackly # 2
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<blockquote data-quote="J E Custom" data-source="post: 1290525" data-attributes="member: 2736"><p>Yes. He was a big advocate of making cartridges more efficient with the existing powders of the day.</p><p></p><p>He also believed that to get the most out of a powder charge, you had to have a cartridge that had the optimum capacity.</p><p></p><p>The #1 was in his mind the most efficient because it had a case capacity of less than 70 grains. (He felt that 70 grains was the most efficient powder charge for .30 caliber) It was not the fastest, but produced higher velocities that cartridges with more powder/volume.</p><p></p><p>He then came up with the #2 Ackley so it could re chambered a 30/06 without setting the shoulder back. this lengthening of the case increased the powder and reduced the efficiency (Over the #1 )because it was slightly over bore but not enough to lose flexibility and increase barrel wear.</p><p></p><p>The Ackley #3 is basically the 300 Weatherby with a 40o shoulder, and he considered it to be Over bored and inefficient with the available powders of the time, and considered it to be a "Barrel Burner''.</p><p></p><p>I cant count the number of cartridges he tested and tried to improve and the best guess is in the neighbor hood of 35 to 40. He tried shoulder angles up to 50o and found that 40o was optimum for efficiency and brass life. Now that we have many more powders to choose from things are much better, But his observations are still very accurate when it comes to efficiency and barrel life with certain powder charges and case volumes for a given caliber. </p><p></p><p>We can produce more velocity because of the wide variety of powders, but using his philosophy, we can still get the most efficiency out of the new powders as well as the older powders.</p><p></p><p>As you can tell, I am a big fan of his work and even own a 300#2 that he actually built himself. Most of my wildcat designs are based on his concepts and have proven very efficient and have exceeded my expectations.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1290525, member: 2736"] Yes. He was a big advocate of making cartridges more efficient with the existing powders of the day. He also believed that to get the most out of a powder charge, you had to have a cartridge that had the optimum capacity. The #1 was in his mind the most efficient because it had a case capacity of less than 70 grains. (He felt that 70 grains was the most efficient powder charge for .30 caliber) It was not the fastest, but produced higher velocities that cartridges with more powder/volume. He then came up with the #2 Ackley so it could re chambered a 30/06 without setting the shoulder back. this lengthening of the case increased the powder and reduced the efficiency (Over the #1 )because it was slightly over bore but not enough to lose flexibility and increase barrel wear. The Ackley #3 is basically the 300 Weatherby with a 40o shoulder, and he considered it to be Over bored and inefficient with the available powders of the time, and considered it to be a "Barrel Burner''. I cant count the number of cartridges he tested and tried to improve and the best guess is in the neighbor hood of 35 to 40. He tried shoulder angles up to 50o and found that 40o was optimum for efficiency and brass life. Now that we have many more powders to choose from things are much better, But his observations are still very accurate when it comes to efficiency and barrel life with certain powder charges and case volumes for a given caliber. We can produce more velocity because of the wide variety of powders, but using his philosophy, we can still get the most efficiency out of the new powders as well as the older powders. As you can tell, I am a big fan of his work and even own a 300#2 that he actually built himself. Most of my wildcat designs are based on his concepts and have proven very efficient and have exceeded my expectations. J E CUSTOM [/QUOTE]
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