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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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<blockquote data-quote="biff&#039;s reloading" data-source="post: 2440779" data-attributes="member: 6078"><p>Theres a ton of gun math out there. Google cartridge overbore ratio and start reading all the forum threads on the subject.</p><p>Case capacity in h20 divided by bore area gets you a basic expansion ratio, then work in the length of the tube (volume) to start understanding how many "case capacities" there are in the bore volume that need to be filled by the gasses produced, then work in the payload (bullet weight x speed =work) to your equation and you will have It. Basically, this is how quick load works. It comes up with a dynamic working number to apply to the known burn rates of all the available powders, which spits out load data in a form we simple humans can understand</p><p></p><p>This chart should list bore AREA, not diameter. You have to do that math yourself to get good results. Pi x r2</p><p>[ATTACH=full]340540[/ATTACH]</p></blockquote><p></p>
[QUOTE="biff's reloading, post: 2440779, member: 6078"] Theres a ton of gun math out there. Google cartridge overbore ratio and start reading all the forum threads on the subject. Case capacity in h20 divided by bore area gets you a basic expansion ratio, then work in the length of the tube (volume) to start understanding how many "case capacities" there are in the bore volume that need to be filled by the gasses produced, then work in the payload (bullet weight x speed =work) to your equation and you will have It. Basically, this is how quick load works. It comes up with a dynamic working number to apply to the known burn rates of all the available powders, which spits out load data in a form we simple humans can understand This chart should list bore AREA, not diameter. You have to do that math yourself to get good results. Pi x r2 [ATTACH type="full" alt="overboreindex2011.png"]340540[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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