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Rifles, Reloading, Optics, Equipment
Reloading
Can primers reduce E.S.?
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<blockquote data-quote="Kennibear" data-source="post: 875673" data-attributes="member: 51650"><p>In support of Bounty Hunter:</p><p></p><p>1) In setting up a Pressure Trace II for four different rifles w/ attendant strain gauges, chamber measurements, case wall thickness @ the strain gauge location , ad infinitum I can tell you the data collection for just AS MEASURED chamber pressure is overwhelming. God forbid someone without some technical measuring skills try it without help. How are you going to measure the actual functioning volume of your chamber? It is not liquid tight so how do you get a volume with the leaks around the standing breach and the front edge of the chamber?</p><p>2) How can we assess, for data purposes, the very primers on our loading bench? The lot of powder currently in your possession? Have you measured any bullets lately? Bullets are easy because great strides have been made in recent years by Makers in very consistent product. How do I know? I measured the bullets. Compared them to old examples or older notes.</p><p>3) How many data points entered to achieve your computer's educated guess?</p><p></p><p>All these programs are a best guess safety net and they still get it wrong once in awhile. I am very thankful they are there and they are an improvement over Homer Powley's slide rule load estimator- but only slightly. Too many variables and the programmer is forced to make a lot of basic assumptions.</p><p> I use these programs too but I do not assume any accuracy in their computations. It's a starting point only, albeit a dam good one.</p><p> But the starting load screams over the chronograph and I stare into a Netbook screen to see what's really happening. Theoretical meets reality. Reality always wins.</p><p></p><p> And the Programs? They are pretty close but never spot on.</p></blockquote><p></p>
[QUOTE="Kennibear, post: 875673, member: 51650"] In support of Bounty Hunter: 1) In setting up a Pressure Trace II for four different rifles w/ attendant strain gauges, chamber measurements, case wall thickness @ the strain gauge location , ad infinitum I can tell you the data collection for just AS MEASURED chamber pressure is overwhelming. God forbid someone without some technical measuring skills try it without help. How are you going to measure the actual functioning volume of your chamber? It is not liquid tight so how do you get a volume with the leaks around the standing breach and the front edge of the chamber? 2) How can we assess, for data purposes, the very primers on our loading bench? The lot of powder currently in your possession? Have you measured any bullets lately? Bullets are easy because great strides have been made in recent years by Makers in very consistent product. How do I know? I measured the bullets. Compared them to old examples or older notes. 3) How many data points entered to achieve your computer's educated guess? All these programs are a best guess safety net and they still get it wrong once in awhile. I am very thankful they are there and they are an improvement over Homer Powley's slide rule load estimator- but only slightly. Too many variables and the programmer is forced to make a lot of basic assumptions. I use these programs too but I do not assume any accuracy in their computations. It's a starting point only, albeit a dam good one. But the starting load screams over the chronograph and I stare into a Netbook screen to see what's really happening. Theoretical meets reality. Reality always wins. And the Programs? They are pretty close but never spot on. [/QUOTE]
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Can primers reduce E.S.?
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