I'm looking at a 1914 Hercules powder catalog. Not sure what all of this means, but they offer--------

FOR BLACKPOWDER RIFLES-- Adapted for Smokeless Powder, "SHARPSHOOTER [dense]" powder

They offer this powder in "Mid-Range Loads" with either alloy or copper cap base bullets .

.30-30 9 grains
.30-40 12 grains
.30-45 14 grains
.32-40 HP 15 grains
.38-55 HP 18 grains