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Rifles, Reloading, Optics, Equipment
Reloading
Setting up a Full Length die.
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<blockquote data-quote="woods" data-source="post: 303062" data-attributes="member: 6042"><p>Great pics!</p><p></p><p>Well I ran into this in American Rifleman May 2009 issue, article on Smith & Wesson's 460XVR on page 54</p><p></p><p>--------------------------------------------------------------------------------------------------------------------------</p><p>quote:</p><p>Had Hornady's engineers not had prior experience loading the .454 Casull, the 460 S&W Mag.'s case would have presented another dilemma. With pressures similar to those of the .454 Casull and production-type revolvers using the new cartridge, Mittelstaedt determined the cases needed to be "cold worked" to the brass' limits, which resulted in maximum strength/hardness, as well as better "springback". Spring back is the case's ability to, under high pressure, expand to the size of the chamber then retract enough for easy extraction. "Soft" brass doesn't "spring back", making extraction difficult. </p><p>---------------------------------------------------------------------------------------------------------------------------</p><p></p><p>It always seemed to me that new brass had more springback. That was observing the behavior of the brass in my dies. I went through it on this thread </p><p></p><p><a href="http://forums.accuratereloading.com/eve/forums/a/tpc/f/2511043/m/7681082701?r=7681082701#7681082701" target="_blank">Springback - Topic Powered by Eve For Enterprise</a></p><p></p><p>I'm not sure if this is what you're saying here</p><p></p><p>---------------------------------------------------------------------------------------------------------------------------</p><p>If you use brass that's been reloaded several times, it will not have sprung back and your measurement will be a bit longer. Your measurement will also be subject to how many times the brass has been fired.</p><p>Subsequently, I use once fired to eliminate that variable. In this example, the once fired brass measures .0045" longer than the new brass. If my once fired brass will chamber in my rifle without ANY tightness, I will attempt to resize my brass to match this number.</p><p></p><p>Once fired brass will typically spring back about .001", so matching this number will give me about .001" clearance with all my reloads.</p><p>If the Once fired brass feels tight when chambered, then I will subtract .001" from it's measurement and that will be the length I will use when adjusting the die. For this example, I'll set the resizing die to push the shoulder back to .0035" (or as close as I can make it).</p><p>---------------------------------------------------------------------------------------------------------------------------</p></blockquote><p></p>
[QUOTE="woods, post: 303062, member: 6042"] Great pics! Well I ran into this in American Rifleman May 2009 issue, article on Smith & Wesson's 460XVR on page 54 -------------------------------------------------------------------------------------------------------------------------- quote: Had Hornady's engineers not had prior experience loading the .454 Casull, the 460 S&W Mag.'s case would have presented another dilemma. With pressures similar to those of the .454 Casull and production-type revolvers using the new cartridge, Mittelstaedt determined the cases needed to be "cold worked" to the brass' limits, which resulted in maximum strength/hardness, as well as better "springback". Spring back is the case's ability to, under high pressure, expand to the size of the chamber then retract enough for easy extraction. "Soft" brass doesn't "spring back", making extraction difficult. --------------------------------------------------------------------------------------------------------------------------- It always seemed to me that new brass had more springback. That was observing the behavior of the brass in my dies. I went through it on this thread [url=http://forums.accuratereloading.com/eve/forums/a/tpc/f/2511043/m/7681082701?r=7681082701#7681082701]Springback - Topic Powered by Eve For Enterprise[/url] I'm not sure if this is what you're saying here --------------------------------------------------------------------------------------------------------------------------- If you use brass that's been reloaded several times, it will not have sprung back and your measurement will be a bit longer. Your measurement will also be subject to how many times the brass has been fired. Subsequently, I use once fired to eliminate that variable. In this example, the once fired brass measures .0045" longer than the new brass. If my once fired brass will chamber in my rifle without ANY tightness, I will attempt to resize my brass to match this number. Once fired brass will typically spring back about .001", so matching this number will give me about .001" clearance with all my reloads. If the Once fired brass feels tight when chambered, then I will subtract .001" from it's measurement and that will be the length I will use when adjusting the die. For this example, I'll set the resizing die to push the shoulder back to .0035" (or as close as I can make it). --------------------------------------------------------------------------------------------------------------------------- [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Setting up a Full Length die.
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