Al45 wrote:
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44Amp, looks like your post was as I was typing. Interesting how data changes over the years. Do the powders change?
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Indeed they do. IMR-4227 was originated by DuPont during the P, SR, and IMR days as a rifle powder for smaller cases. DuPont reformulated one time, then it became IMR Powder Co. and now is sold as H-4227.
Go by current published reloading manuals, and update your own notes periodically.
Just to show off my knowledge, and age, under the old DuPont nomenclature, P was Pistol powder, SR was Sporting Rifle, and IMR was for Improved Military Rifle powder.
Incidentally, IMR-4227 is a whamdoodler in the .44 Magnum!
Bob Wright