Thread: M&P .40 rifling twist rate
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Old 01-07-2011, 11:04 PM
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Kelly Green Kelly Green is offline
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The S&W .40 twist rate is 1-16 and the standard 9mm is 1-10. There are variants. Colt makes a Government Model 1911-A1 in 9mm with a 1-16 twist and Springfield Armory had a 1-16 twist in their 9mm and .40 S&W 1911-A1’s.
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