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Brian Enos's Forums... Maku mozo!

m&p 9FS twist rate?


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S&W standard 9mm barrel twist rate was 1-18.75” or 1-16“, (depending on who you talk to.) Five grove, cut rifling, right hand twist, is still the standard I believe for all S&W barrels.

I understand on the post 2010 9mm M&P barrels they’ve switched to a 1-24” to try and get better accuracy with 115-124 gr. bullets.


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