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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Overbore Index Chart & 26 Nosler
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<blockquote data-quote="Trickymissfit" data-source="post: 1006179" data-attributes="member: 25383"><p>I read Ackley's work several times, plus two or three others. All were similar, and yet a little different. What I like about Ackley is that he spells out what the bore can handle (powder burn), and then you can take it from there. What Ackley didn't really get involved with was things like accuracy (as in target shooting), and to a certain extent cartridge case shape. He does mention some short case designs that are very similar to the WSM series, but doesn't go much further. </p><p> </p><p>Looking at the chart, I see some interesting things, and others that make little sense. A fine example is the 6PPC. Most folks think it's a near perfect case capacity for the 6mm bore. Although others have actually shortened the case up to .100" with great results. If one looks at the chart he might be turned away, when it's a well known shooter.</p><p> </p><p>Ackley may have been the first to spell doom on over bore rifles. He pointed out the loss of accuracy, barrel life issues, and one thing seldom discussed; over bore rounds are much harder to develop hand loads for as they are somewhat finicky. He also points out the issue with high volume to bore ratios, and being down loaded. Few others will even speak of this.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 1006179, member: 25383"] I read Ackley's work several times, plus two or three others. All were similar, and yet a little different. What I like about Ackley is that he spells out what the bore can handle (powder burn), and then you can take it from there. What Ackley didn't really get involved with was things like accuracy (as in target shooting), and to a certain extent cartridge case shape. He does mention some short case designs that are very similar to the WSM series, but doesn't go much further. Looking at the chart, I see some interesting things, and others that make little sense. A fine example is the 6PPC. Most folks think it's a near perfect case capacity for the 6mm bore. Although others have actually shortened the case up to .100" with great results. If one looks at the chart he might be turned away, when it's a well known shooter. Ackley may have been the first to spell doom on over bore rifles. He pointed out the loss of accuracy, barrel life issues, and one thing seldom discussed; over bore rounds are much harder to develop hand loads for as they are somewhat finicky. He also points out the issue with high volume to bore ratios, and being down loaded. Few others will even speak of this. gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Overbore Index Chart & 26 Nosler
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