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Rifles, Reloading, Optics, Equipment
Reloading
Flatning Primers and Blowing Out Primers
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<blockquote data-quote="J E Custom" data-source="post: 453792" data-attributes="member: 2736"><p>If you are not sure that you are getting a good measurement with the gauge, try the old way.</p><p></p><p>Take a sized case and insert the bullet you want to use, long and very carefully insert it in</p><p>the chamber until the bolt stops(No pressure) then seat it a little deeper .005 to .010 at a time</p><p>measuring COL as you go. when the bolt will close with little or no effort measure the COL and</p><p>subtract .003 to .005 to this dimension because even though you just barely touch the rifling it </p><p>will engrave slightly.</p><p></p><p>This will be your "Actual" COL and with this length start by reducing COL by .020 to start load </p><p>develoupment.(Note if the bullet is touching the rifling you need to start at or below minimum</p><p>load data).</p><p></p><p>I weight sort all of my brass and end up with several that are out of batch range and I use these </p><p>to make my COL gauges for different bullets and leave them in my die sets (Painted red and with </p><p>no primer). These are set at the final COL that the load performed best with that bullet.</p><p></p><p>I always start .020 off the lands and work up in pressure and velocity and when the most likely</p><p>load is found THEN I adjust the COL closer or farther from the lands for accuracy by .005 </p><p>increments.</p><p></p><p>Just the way I do it to optimize the accuracy, velocity and pressure.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 453792, member: 2736"] If you are not sure that you are getting a good measurement with the gauge, try the old way. Take a sized case and insert the bullet you want to use, long and very carefully insert it in the chamber until the bolt stops(No pressure) then seat it a little deeper .005 to .010 at a time measuring COL as you go. when the bolt will close with little or no effort measure the COL and subtract .003 to .005 to this dimension because even though you just barely touch the rifling it will engrave slightly. This will be your "Actual" COL and with this length start by reducing COL by .020 to start load develoupment.(Note if the bullet is touching the rifling you need to start at or below minimum load data). I weight sort all of my brass and end up with several that are out of batch range and I use these to make my COL gauges for different bullets and leave them in my die sets (Painted red and with no primer). These are set at the final COL that the load performed best with that bullet. I always start .020 off the lands and work up in pressure and velocity and when the most likely load is found THEN I adjust the COL closer or farther from the lands for accuracy by .005 increments. Just the way I do it to optimize the accuracy, velocity and pressure. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Flatning Primers and Blowing Out Primers
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