Drams (volume), Grams and Grains (weight) and Dram Equivalent are complicated

Henry Sharp, The Gun: Afield & Afloat, 1904
http://books.google.com/books?id=BFRDAAAAIAAJ&pg=PA66&lpg
“Sportsmen are now in possession of two definite types of smokeless powder, the so-called bulk powder and the newer concentrated or condensed powder. The first is designed to occupy the same space as black powder in the cartridge-case, although only weighing about half as much.”

Also see p. 445 here
http://books.google.com/books?id=Wv0MAQAAIAAJ&pg=PA442&lpg

Bulk and Dense Smokeless Equivalents

………………..BULK…………….....................................................DENSE………
.............'E.C.'......DuPont…...Schultze...…Walsrode Green......Ballistite.…Infallible

3 Dram....42...........36.5..............42................30………..…...24..............21 grains
3 1/4…....45.5.........41................45................32……..….…..26..............23 grains
3 1/2…....49...........43................48................34………..…...28..............25 grains

Please note the "E.C." and Schultze are the original formulations; 14 gr = 1 Dram Eq. "E.C." No. 2 and "New Schultz" were 12 gr/Dr. Eq. and "E.C." No 3 was 11 gr/Dr. Eq.

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