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Pressure Velocity and Energy of Black Powder Express Cartridges. 
Cartridge. 
Grains 
of 
Powder. 
Bullet 
Grains. 
Pressure 
in tons per 
sq. inch. 
Muzzle 
velocity, 
ft, " 
per sec. 
Muzzle 
energy in 
ft. pounds. 
Striking 
velocity 
at 100 
yds. feet. 
persecond 
Striking 
energy 
at 100 yds. 
in foot 
pounds. 
"577 Bore. 
167 
560 
10 
1,740 
3,784 
1,517 
2,877 
•500 
136 
340 
10 
1,880 
2,683 
1,575 
1,88d 
•450 
120 
270 
11 
1,950 
2,292 
1,633 
1,607 
.450 
120 
365 
12 
1.750 
2,495 
1,530 
1,907 
•500/450 
140 
365 
10 
1.850 
2,788 
1,620 
2,138 
•400/400 „ 
110 
270 
11 
1.800 
1,953 
1,560 
1,468 
Miscellaneous Information. 
Directions for self-measurement .—Take a piece of wood with a perfectly 
straight edge that is long enough to reach from the muzzle to the extremity of 
the butt, lay this straight edge along the upper rib of the gun. Then measure 
the distance between the heel of the butt and the bottom of the straight e ge, 
and from the point of the comb also to the bottom of the straight edge. These 
measurements give the bend. For length the measurements will be from the 
I ______ 
