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Message: <blockquote data-quote="Blitzfike" data-source="post: 2703984" data-attributes="member: 807"><p>In most cases you will not see a significant difference, but take into consideration that lots of powder made in the '60s may differ significantly from that made today, and that is why some of the loading data is different for a specific powder today. I would not consider mixing Hercules Red dot powder from 1968 with Alliant Red dot powder manufactured today. The manfuacture of some of those powders have been transferred to companies that didn't even exist back then. Another case in point is comparing Alliant Promo with Alliant Red dot. The charge WEIGHT is the same for a given load between them, but if you set up a powder measure using one and then substitute the other, the powder density rears its ugly head and gives you a different WEIGHT for the same volume. I don't expect to see that in different lots of powder manufactured within a couple of years of each other, but you can never tell. That's an easy comparison for safety before mixing. Just my two cents..</p></blockquote><p></p>