It's been fun Frank, but hard for this non-engineer with a bit of math dyslexia - really a miracle I made it through chemistry and physics, but it was the U. of Mo.
This is interesting
“Experiments by Mr. R.W.S. Griffith of the Schultze Powder Co.” in
Sporting Guns and Gunpowder
https://books.google.com/books?id=in...AAJ&pg=PA38&dq
LOADS……….................……………..……………1 1/8oz….1oz.....7/8oz.
………………………………....................……………….12g…..16g…. .20g
Curtis & Harvey No. 4 T.S. Black Powder...….82….…74….…66 grains
Schultze and “E.C.” Bulk Smokeless.……....….42….…37….…33
Walsrode Dense Smokeless...………………........28…….24….…22
12g = 3 Dram or 3 Dr. Eq.
16g - 74 gr. BP = 2.7 Drams; 37 gr. Bulk = 2.64 Dr. Eq.; 24 gr. Dense Walsrode = 2.57 Dr. Eq.
20g - 66 gr. BP = 2.4 Drams; 33 gr. Bulk = 2.36 Dr. Eq.; 22 gr. Dense = 2.38 Dr. Eq.
Chamber pressures were expressed as Tons/sq. inch. If simply multiplied by 2240 the pressures are unreasonably low. Using Burrard’s conversion yields what seem to be accurate numbers:
………….....……..
12……….
16……...
20
C.&H. No. 4…6,373…..7,078.…..6,944
C.&H. No. 2…7,459…..8,310...…8,288
Schultze……...4,424…..6,272.…..7,246
“E.C.”……..…..3,685…..6,171.…..8,322
Walsrode.…….9,363………......….10,741
S.S. …..….……9,800….....………….10,539
S.S. (Smokeless Shot-gun)
BTW: usually pretty nice in Vegas this time of year but rainy and cold Friday and yesterday with LOTS of snow across northern AZ. Come out to the show some time
Josh said he'd like to continue to have a significant Parker presence at the show.