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Brian Enos's Forums... Maku mozo!

9mm minor with 147gn and tightgroup


Tanfogliofan

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Can somebody properly explain power factors?

Ah, it's in the rulebook ;)

Bullet weight x velocity = PF

Minor = 125,000

Major = 165,000

Most folks just divide by 1,000 and drop the extra three zeros. You want to give yourself a cushion above those numbers to make sure you still make PF at matches where they chrono your ammo, and this is especially important for Minor since going sub-minor is shooting only for fun. R,

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