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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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<blockquote data-quote="Mikecr" data-source="post: 2440178" data-attributes="member: 1521"><p>What has been working great for me:</p><p>Using QuickLoad, I run what-ifs to find fastest powder that fills the case, right at SAAMI max pressure, causing no more than 8Kpsi muzzle pressure, with a given case/bullet/barrel length. I tweak barrel length where that's under my control to nail this.</p><p>Cartridge design also plays a big role in this, as it can hold powder back to burn in/near chamber, or it can add a slug of unburned powder to bullet mass, burning way down the barrel or on muzzle release, if at all. The latter in extreme can cause a secondary pressure spike exceeding 1st pressure peak, to a dangerous level. And it's opposite of clean bullet release..</p><p></p><p>A competitive 6PPC sees ~6,600Kpsi at the muzzle, efficient mid-hunting capacity ~8Kpsi, a good magnum ~12Kpsi.</p><p>Barrel lengths follow.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2440178, member: 1521"] What has been working great for me: Using QuickLoad, I run what-ifs to find fastest powder that fills the case, right at SAAMI max pressure, causing no more than 8Kpsi muzzle pressure, with a given case/bullet/barrel length. I tweak barrel length where that's under my control to nail this. Cartridge design also plays a big role in this, as it can hold powder back to burn in/near chamber, or it can add a slug of unburned powder to bullet mass, burning way down the barrel or on muzzle release, if at all. The latter in extreme can cause a secondary pressure spike exceeding 1st pressure peak, to a dangerous level. And it's opposite of clean bullet release.. A competitive 6PPC sees ~6,600Kpsi at the muzzle, efficient mid-hunting capacity ~8Kpsi, a good magnum ~12Kpsi. Barrel lengths follow. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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