ORIGINAL: cayugad
1687 = 80 1892 = 100 grains of Black Horn with a Barnes 300 grain Expander. So if you can find the BC of an expander, you can run it through a ballistic calculator with the kind of sight in distances, etc you want.
Barnes #45105 275g XPB BC of .141, usiing HPH12
Barnes Expander MZ 300g #45131 BC .207, using HPH12
Barnes Origonal 300g #457010 Spitzer SP BC .291, using MMP Orange
Barnes X-bullet 300g XFN 45832 BC .204, using MMP Orange
Barnes X-bullet 300g FB 45802 BC .235, using MMP Orange
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