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  1. D

    tenths of moa

    I'm trying to determine how much difference .4 inches makes at 500 yards and greater. My JBM download, shows about .4 inch difference from a previous download. I tried the math, ("my worst enemy"); but here goes. If 1 MOA = 1.047, then 1.047 X .4 = .4188 X 5 (500 yds) = 2.094 inches additional...
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    Flash Holes

    New to the site. First post. Have a reloader friend in Phoenix who noticed a flash hole difference in LC 14 (M-80) and LC 14 (M-80 with 5 dimpled dots on baseof case head) and IVI 69 (Canadian) of smaller diameter. The LC and IVI had diameters of .070 while the other LC 14 had standard Saami...