elkhunter,
About 15 years ago, when Western Powders was starting to market their Ramshot brand, I did some experimenting with a new-to-me .416 Rigby, finding 100 grains of Magnum to works excellently with 400-grain bullets. I reported this to the owner of Western Powders, who said, "Yes!!! I love it when the powder level drops half an inch with each pull of the measure handle...."
