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Thread: Fl sizer not sizing the neck?

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  1. 29-06-2024, 02:54 PM #25
    grandpamac
    grandpamac is offline
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    I measured the expander ball on my 50 plus year old Lyman .303 dies and came up with 7.88 mm (0.3102") so I suspect your dies are not reducing the neck enough or the projectiles are too small. Your inside case mouth dia is larger than your expander ball and barely larger than your projectiles which you may want to measure as well. Projectiles I have measured are around .311" for military and .312" for other. Projectiles for the Russian round would be too small.
    GPM.
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