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Just tried my load of 748 (26.0 grs) under the Win 55 gr FMJBT. These seem to be real screamers! Have not shot for accuracy as of yet. Anyone have any experience with this powder? Winchester claims 3170 fps. I don't have a chrono so I don't know what I am getting, but the brass is all pilling into a one foot circle! Thanks for any input!
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