Diagram showing British Mark XIV (top) and Mark XIII (bottom) cartridges for QF 6 pounder Hotchkiss gun. These were the latest available rounds as at the beginning of 1915.
Mk XIV Cartridge was designated for Naval service :-

• Case Mk III of solid drawn brass. Lacqured inside and out with transparent lacquer (standard for Naval service).
• The percussion cap is of copper and contains 1.2 grains of cap composition.
• Charge Mk IV is Cordite M.D. size 4 1/4. 8 oz 11 1/2 drams. Cut 9.5 inches long. Two fins 2.5 inches long each contain 1 dram cordite, pass through the charge to keep it centred in the case.
• Mk VII Igniter contains 4 drams R.F.G.2 powder between 2 disks of shalloon.
• Mk V Steel Shell shell is forged steel, head nearly 3 calibres radius. Filled with 4 oz QF shell F.G. powder. Painted black. Originally intended for anti-shipping use, not field use.
• Hotchkiss base percussion fuze.

Mark XIII Cartridge was designated for Land or Naval service :-

• Mk IV case with No. 2 Mk IV percussion primer.
• Charge Mk III is Cordite M.D., 8 oz 11 1/2 drams, size 4 1/4.
• No igniter. The magazine cylinder on the end of the primer acts as an igniter, and fits into the base of the charge and hence holds it in place.