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Thread: Slow Powder, Heavy GC boolit, anyone got a ballistics calculator?

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  1. 29-01-2019, 09:19 AM #13
    Driverman
    Driverman is offline
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    Im looking forward to your results. I have been shooting cast in 303.s for nearly 50 years and have settled on fast pistol powder with 220 grain mixed alloy boolits at 1800ish fps. Best accuracy tho is if kept below the rpm threshold at 1650 fps. If you've looked up Larry Gibson on the cast boolit website he has several hours reading on rpm threshold and cast boolit alloy ,fit and lube.
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