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Rifles, Reloading, Optics, Equipment
Reloading
Ladder Test Results...need help analyzing.
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<blockquote data-quote="azsugarbear" data-source="post: 703825" data-attributes="member: 4809"><p>I use a modified ladder test in developing my loads. Testing via the ladder approach can use up a lot of bullets and barrel life. So I use Kirby Allen's method, then follow up with short ladder to confirm results.</p><p></p><p>Kirby Allen, a well-respected gunsmith on this site, develops his loads by finding the max powder charge where max velocity/pressure is achieved - usually exhibited by a slightly sticky bolt lift. He then back off two grains - and that is his load. This method has its share of critics, but I have found that in shooting a ladder test there is a node near the top or peak of the pressure curve.</p><p></p><p>So that is what I do. I load up a single round with a specific charge and then load subsequent rounds with a 1 grain incremental increase. When the bolt lift gets sticky, I stop. I then back off two grains and the load up enough rounds for a short ladder test. For example, if max load is 65 grains, then I back off to 63 grains. I then load a ladder test in .3 grain increments starting at 61.5 on up to 64.5. I almost always find a node somewhere within this spread.</p><p></p><p>I have found this method saves both time and money. To each his own.</p></blockquote><p></p>
[QUOTE="azsugarbear, post: 703825, member: 4809"] I use a modified ladder test in developing my loads. Testing via the ladder approach can use up a lot of bullets and barrel life. So I use Kirby Allen's method, then follow up with short ladder to confirm results. Kirby Allen, a well-respected gunsmith on this site, develops his loads by finding the max powder charge where max velocity/pressure is achieved - usually exhibited by a slightly sticky bolt lift. He then back off two grains - and that is his load. This method has its share of critics, but I have found that in shooting a ladder test there is a node near the top or peak of the pressure curve. So that is what I do. I load up a single round with a specific charge and then load subsequent rounds with a 1 grain incremental increase. When the bolt lift gets sticky, I stop. I then back off two grains and the load up enough rounds for a short ladder test. For example, if max load is 65 grains, then I back off to 63 grains. I then load a ladder test in .3 grain increments starting at 61.5 on up to 64.5. I almost always find a node somewhere within this spread. I have found this method saves both time and money. To each his own. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Ladder Test Results...need help analyzing.
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