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Rifles, Reloading, Optics, Equipment
Reloading
Annealing with lead - process?
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<blockquote data-quote="tlk" data-source="post: 407012" data-attributes="member: 11397"><p>Oooooooh, graphs.......me likey.......</p><p> </p><p>OK, so this breeds a series of relevant questions (to me):</p><p> </p><p>1. Mike's first chart is using C26000 alloy as the test - is that what current brass is, and is it consistent across all manufacturers? If not, can this chart be reliably used as a "generally specific" guideline?</p><p> </p><p>2. Loner - where are you getting the 100 in hardness as the ideal to get to for a cartridge?</p><p> </p><p>3. How can hardness of a case mouth be reliably measured at the bench? This one data element would probably help out in a great way with what we are doing here.</p><p> </p><p>4. Can fired hardened brass be brought back to its original hardness?</p><p> </p><p>5. Why does brass have to be brought back to its original hardness? Can't something along the scale work as long as it is consistent between cases AND grips the bullet? Because....when I take Mike's first graph, place in 650, 700, and 750 degrees it shows a hardness for each one of ~105, ~103, ~102 respectively. 800 is showing a hardness of 100. Honestly, how much diffference is there between a hardness of 102 and 103 (which is 50 degrees F). For that matter, what is the difference between that and 100? Is it really material? Do we even know? </p><p> </p><p>If we can use this graph as a general guideline, it is trying to tell us something about the temp range we are working at, people! The slope (rate of change) of the hardness reduction is conveniently levelling out around the temps just past 650 - AND the hardness values are so close together within those ranges I wonder if we are making a mountain out of a molehill. Seems to me we could set the temp range for between 700 and 750, dip away and be pretty damned consistent (within 2 points of hardness).</p><p> </p><p>Facts men, we need FACTS!!<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p> </p><p>Mike, thanks for the graphs.</p></blockquote><p></p>
[QUOTE="tlk, post: 407012, member: 11397"] Oooooooh, graphs.......me likey....... OK, so this breeds a series of relevant questions (to me): 1. Mike's first chart is using C26000 alloy as the test - is that what current brass is, and is it consistent across all manufacturers? If not, can this chart be reliably used as a "generally specific" guideline? 2. Loner - where are you getting the 100 in hardness as the ideal to get to for a cartridge? 3. How can hardness of a case mouth be reliably measured at the bench? This one data element would probably help out in a great way with what we are doing here. 4. Can fired hardened brass be brought back to its original hardness? 5. Why does brass have to be brought back to its original hardness? Can't something along the scale work as long as it is consistent between cases AND grips the bullet? Because....when I take Mike's first graph, place in 650, 700, and 750 degrees it shows a hardness for each one of ~105, ~103, ~102 respectively. 800 is showing a hardness of 100. Honestly, how much diffference is there between a hardness of 102 and 103 (which is 50 degrees F). For that matter, what is the difference between that and 100? Is it really material? Do we even know? If we can use this graph as a general guideline, it is trying to tell us something about the temp range we are working at, people! The slope (rate of change) of the hardness reduction is conveniently levelling out around the temps just past 650 - AND the hardness values are so close together within those ranges I wonder if we are making a mountain out of a molehill. Seems to me we could set the temp range for between 700 and 750, dip away and be pretty damned consistent (within 2 points of hardness). Facts men, we need FACTS!!:D Mike, thanks for the graphs. [/QUOTE]
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Annealing with lead - process?
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