I have an 1882 H&H 500 BPE rifle that has this charge inscribed on the side of the action:

"charge 5 drams NA, case 3 inches"

I have searhed high and low, and have asked a number of knowledgeable individuals, "what does the NA stand for, exactly" ?
All comments and suggestions are welcomed. Thank you, Herb


"In my GSP I do trust"