Quote:
Originally Posted by ArchAngelCD
I agree with Skip, I always check the powder and bullet manufactures data before i load anything. Also, much of the Lyman data has been reprinted for decades and not retested so it can also be faulty. Their new data is actually tested by them as was the older data but the older stuff is still old.
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Great point. Keep in mind powder manufacture is not EXACT. It's darn close , but powder burn rates can vary significantly from lot to lot. I've always heard "some lots are faster/alower" for as long as I've been loading.
And powder 'lots' are manufactured by the ton or more.