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Thanks doc. Like you said there has always been about 1 grain difference in the load data between IMR and H labeled powders. Until my chrono proves otherwise I’ll treat it that way.
It’s funny because Hodgdon won’t give data for both powders in the data for the same bullet, it’s always either/or. You would think that any changes in powder make up would be posted in bright bold writing on their website to avoid confusion.