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The reloading manuals I have used all say that while they are similar, they are not to be regarded as interchangeable.
Anyway, I think the best use for very okd powder is as lawn fertilizer.

It is possibly the 2nd WW surplus 4831 powder repackaged from bulk war stockpiles. This was used in large calibre heavy machine guns. It was extensively marketed as 4831 by Hodgdons and more recently...