Hi,

I re-found this information amoungst my "pile o' stuff". I though perhaps it might find some interest here. I readily admit it is fairly old. I found it in a Nov 1993 issue of Guns and Ammo. And it only tests Real Black and Pyrodex (hey, it was all there was back then). I wish I could scan and insert the pressure curve chart. It's quite a bit slower and lower than modern smokeless powder.

Bullet Powder Charge Velocity(fps) Pressure(psi)

435gr Buffalo 90grs Ffg 1290 8100
100grs Ffg 1350 10,000
110grs Ffg 1430 11,700
120grs Ffg 1490 12,600

435grs Buffalo 70grs Pyrodex RS 1350 10,100
80grs Pyrodex RS 1435 11,800
90grs Pyrodex RS 1500 13,600

435grs Buffalo 80grs Fffg 1300 11,800

435grs Buffalo 70grs Pyrodex Select 1300 9200
72.5grs Pyrodex Select 1395 12,000
75grs Pyrodex Select 1500 14,600

Speer 225gr 90grs Ffg 1520 6000
.44 JHP in 70grs Pyrodex RS 1615 7000
MMP .54/.44
White Sabot

Test rifle: Knight .54cal barreled action. Direct reading piezo-electic pressure pickup and a strain gauge connected to an Ohler Model 43. Tests conducted by Bob Forker

Dale