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Rifles, Reloading, Optics, Equipment
Reloading
Velocity difference between new brass and fired brass
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<blockquote data-quote="Mikecr" data-source="post: 1827020" data-attributes="member: 1521"><p>OK, you size & prep 10pcs and fire them let's say~4 times each with a load development. Now you have a good load and 10 developed cases it applies to. This means what for the other 490, which you intend to fire form -eventually?</p><p>Are you then going to develop a load for new brass, using ~40cases, so that you can use 450 with 1st fire forming?</p><p>Then do it again for 2nd fire forming?</p><p>Are you suggesting that there is so little difference between new brass and fully fire formed brass(for you) that it doesn't matter?</p><p>And are you saying that it just isn't viable to fire form 500pcs of brass up front, because it would wipe out your in barrel doing so?</p><p>I agree with the last, and am glad I don't need to develop 500 cases.</p><p></p><p>I'm pretty sure your situation is kind of specialized, and that by far most people do not need so many developed cases.</p><p>Personally, I've never needed more than 50 on-hand. And with this, I go ahead and fire them to fully stable before moving to powder development. During this fire forming I would do primer testing, and full seating testing, and 'MyMax' load testing only.</p><p>With my cartridges, and charging for full load density and near SAAMI max pressures, where I get best results, there is significant difference between new and developed cases. So much so that it makes no sense to **** with powder while cases are still changing.</p><p>And for sure I don't use cases still changing for hunting or competition.</p><p></p><p>If I needed 500 cases, let's say for PD hunting, then I would have a scrap fire forming barrel chambered along with my hunting barrel to handle this. Spend a week developing my brass, and then move into powder development with my hunting barrel.</p><p>Less tail chasing.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 1827020, member: 1521"] OK, you size & prep 10pcs and fire them let's say~4 times each with a load development. Now you have a good load and 10 developed cases it applies to. This means what for the other 490, which you intend to fire form -eventually? Are you then going to develop a load for new brass, using ~40cases, so that you can use 450 with 1st fire forming? Then do it again for 2nd fire forming? Are you suggesting that there is so little difference between new brass and fully fire formed brass(for you) that it doesn't matter? And are you saying that it just isn't viable to fire form 500pcs of brass up front, because it would wipe out your in barrel doing so? I agree with the last, and am glad I don't need to develop 500 cases. I'm pretty sure your situation is kind of specialized, and that by far most people do not need so many developed cases. Personally, I've never needed more than 50 on-hand. And with this, I go ahead and fire them to fully stable before moving to powder development. During this fire forming I would do primer testing, and full seating testing, and 'MyMax' load testing only. With my cartridges, and charging for full load density and near SAAMI max pressures, where I get best results, there is significant difference between new and developed cases. So much so that it makes no sense to **** with powder while cases are still changing. And for sure I don't use cases still changing for hunting or competition. If I needed 500 cases, let's say for PD hunting, then I would have a scrap fire forming barrel chambered along with my hunting barrel to handle this. Spend a week developing my brass, and then move into powder development with my hunting barrel. Less tail chasing. [/QUOTE]
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Velocity difference between new brass and fired brass
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