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Rifles, Reloading, Optics, Equipment
Reloading
Is This Excessive Pressure??
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<blockquote data-quote="Nevmavrick" data-source="post: 1496536" data-attributes="member: 69100"><p>Actually, Rhovee, I do believe that the factory, SAAMI, is the practical max. For instance, some are loaded so that the highest round of a series is, ie, 65k. Others are loaded so the highest of a series is, ie, 45k.</p><p>All of this would depend heavily on the actions that are built for that particular cartridge.</p><p>Some calibers are produced in very strong actions, such as .300WSM, or .300 Roy, so the factories would load to higher pressures, but they are practical maximums. There is very little reason to try to exceed their ballistics. To do so would only shoten barrel and case life. To increase by any usable amount, only increases the likelihood of popping a primer and sending gasses back through the bolt. Few would use those pressures in an auto, or lever-action.</p><p>We return to the low-pressured calibers....30/30 cases aren't as strong as Magnum, because the actions they are used in don't have the lockup strength.</p><p>The "Max" that many handloaders refer to is the most that a case will hold before it fails most of the time. Cases fail looong before actions do.</p><p>Ingwe has reached a point that with quite a bit of powder (1gr) will give a bare minimum (13fps) of return, therefor, he has passed the practical max. </p><p>I would expect 30-50fps to be gained with .4-.5gr of powder with 175gr bullet in a short-magnum (2.5" case) Any less, and I would start looking in a different direction, probably looking for my best accuracy. </p><p>He asked if his effects were excessive, and, mostly, has been told he is looking at the wrong things, but already has found his answer through his chronograph.</p><p>Have fun, Gene</p></blockquote><p></p>
[QUOTE="Nevmavrick, post: 1496536, member: 69100"] Actually, Rhovee, I do believe that the factory, SAAMI, is the practical max. For instance, some are loaded so that the highest round of a series is, ie, 65k. Others are loaded so the highest of a series is, ie, 45k. All of this would depend heavily on the actions that are built for that particular cartridge. Some calibers are produced in very strong actions, such as .300WSM, or .300 Roy, so the factories would load to higher pressures, but they are practical maximums. There is very little reason to try to exceed their ballistics. To do so would only shoten barrel and case life. To increase by any usable amount, only increases the likelihood of popping a primer and sending gasses back through the bolt. Few would use those pressures in an auto, or lever-action. We return to the low-pressured calibers....30/30 cases aren't as strong as Magnum, because the actions they are used in don't have the lockup strength. The "Max" that many handloaders refer to is the most that a case will hold before it fails most of the time. Cases fail looong before actions do. Ingwe has reached a point that with quite a bit of powder (1gr) will give a bare minimum (13fps) of return, therefor, he has passed the practical max. I would expect 30-50fps to be gained with .4-.5gr of powder with 175gr bullet in a short-magnum (2.5" case) Any less, and I would start looking in a different direction, probably looking for my best accuracy. He asked if his effects were excessive, and, mostly, has been told he is looking at the wrong things, but already has found his answer through his chronograph. Have fun, Gene [/QUOTE]
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Is This Excessive Pressure??
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