MODERN GUNPOWDER AND CORDITE. 
271 
Fm. 2. 
EXPLOSIVE AND PEOPELLANT 
EFFECT ON GUN AND PEOJECTILE. 
X Mil 1 
s l 111 ’ 
9 I'lii 'fes 
£ liiCs 
!!!}! 
ftl 
"'ll 1 
HIGH EXPLOSIVE 
GUNCOTTON . 
CUN BURST 
M.V. ALMOST NIL, 
EXPLOSIVE 
R.L.C. 
Rifle Large Grain 
60lb Charge 
M. V. 
1313 
PROPELLANT 
PRISM 1 S.B'C. 
SlowBurninc Cocoa 
360lb Charge 
M.V, 
2040 
introduction of rifled guns we find a pressure recorded against B.L.G. 
powder of 53 tons; and only a few years ago, just before the manu¬ 
facture of P 3 powder ceased, the pressures developed by it reached 29 
tons, while the muzzle velocities in eacb case were comparatively low. 
On the other hand, the more recent gunpowders nearly fulfil the re¬ 
quirements of the artillerist, and give a high muzzle velocity with 
moderate and regular pressures properly distributed throughout the 
