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The Range
Ammo & Reloading
Load development for the individual firearm, 6.5 Creedmoor
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<blockquote data-quote="JEVapa" data-source="post: 3736936" data-attributes="member: 41176"><p>I anneal after 5-6 loads depending on how hot they are. Maybe less, but it depends on what the brass starts to look like. When you anneal, it's not quite the same as steel, and some of our machinists/metallurgists can point out what the processes are. </p><p></p><p>Think of how a case is made and why it's made that way. </p><p>3 parts: Case head/base, body, and shoulder/neck. Case head needs to be thick, strong, tough, and can't deform - it never gets any heat. Body it less thick but still needs to be strong enough to contain the combustion of the powder without deforming or fracturing. The neck though, has to be soft to allow for repeated firings and manipulations in size/shape, along with the shoulder. </p><p></p><p>You don't want the high heat going way down into the body. You want it to stop just below the shoulder. If you heat up the neck and that heat moves down into the body and dissipates over time, which is what happens with ambient cooling, it's fairly probable you'll anneal the body. The water is what stops the heating process. </p><p>Heat the neck until it discolors just below the shoulder and dump it in water.</p><p></p><p>Take a look Lake City and Federal brass for the GOV or other factory ammo that's not polished and you see where the annealing stops.</p><p></p><p>There's a good write up somewhere on the net about all the who's, how's, and why's of annealing brass along with some methods. I'll see if I can find it.</p></blockquote><p></p>
[QUOTE="JEVapa, post: 3736936, member: 41176"] I anneal after 5-6 loads depending on how hot they are. Maybe less, but it depends on what the brass starts to look like. When you anneal, it's not quite the same as steel, and some of our machinists/metallurgists can point out what the processes are. Think of how a case is made and why it's made that way. 3 parts: Case head/base, body, and shoulder/neck. Case head needs to be thick, strong, tough, and can't deform - it never gets any heat. Body it less thick but still needs to be strong enough to contain the combustion of the powder without deforming or fracturing. The neck though, has to be soft to allow for repeated firings and manipulations in size/shape, along with the shoulder. You don't want the high heat going way down into the body. You want it to stop just below the shoulder. If you heat up the neck and that heat moves down into the body and dissipates over time, which is what happens with ambient cooling, it's fairly probable you'll anneal the body. The water is what stops the heating process. Heat the neck until it discolors just below the shoulder and dump it in water. Take a look Lake City and Federal brass for the GOV or other factory ammo that's not polished and you see where the annealing stops. There's a good write up somewhere on the net about all the who's, how's, and why's of annealing brass along with some methods. I'll see if I can find it. [/QUOTE]
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