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Thread: ballistic calculator's can be wrong

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  1. 16-10-2022, 06:18 PM #15
    NO4
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    Quote Originally Posted by grandpamac View Post
    I often wondered if the difference came from throat erosion. Measuring the crush length for 174 grain RN was around 6mm longer on a used but in good condition barrel than two near new barrels. I still have to chronograph the same load to see how much difference this makes.
    GPM.
    one would think it would have been the opposite, Would be interested in your results, gotta love the ol 303
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