Found it, for 80 grain bullets starting loads are no0 38 gr, no1, 33 and no 2 29.5 so the imr equivalents appear to be 4350,4320, and 3031 respectively. Do they still make those powders? I had some nobel no 80 shotgun powder given to me a while back would have been 40 plus years old and had started to decompose.
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