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Rifles, Reloading, Optics, Equipment
Reloading
Help me understand…
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<blockquote data-quote="Gunpowder" data-source="post: 2107739" data-attributes="member: 1425"><p>I think a lot of the pressure differences you're seeing is the old standard of measurement vs new. Like you noted, all the newer powders were 60+ psi. Look again at 4064 and 4831, does it say psi, or cup? Before modern pressure testing equipment, they used the copper crusher system, which used little copper discs or cups as I remember reading it. So when it says 50k CUP, that's Copper Units of Pressure.</p></blockquote><p></p>
[QUOTE="Gunpowder, post: 2107739, member: 1425"] I think a lot of the pressure differences you're seeing is the old standard of measurement vs new. Like you noted, all the newer powders were 60+ psi. Look again at 4064 and 4831, does it say psi, or cup? Before modern pressure testing equipment, they used the copper crusher system, which used little copper discs or cups as I remember reading it. So when it says 50k CUP, that's Copper Units of Pressure. [/QUOTE]
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Reloading
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