The 4.5-inch (110 mm) ammunition was separate loading, the shell and cartridge were loaded separately, with charge bags being removed from the cartridge as necessary.
 The full charge was charge five, i.e. the cartridge case had an irremovable charge (one) and four incremental bags.
 Shells were delivered fuzed.
 In 1914 the ammunition scale for 4.5-inch howitzers was 70% shrapnel and 30% HE.

New types of shell were introduced during the First World War.
 These were chemical at the end of 1915, incendiary shells in 1916 and smoke shells in 1917.
 Smoke shells were phosphorus filled with both steel and cast iron bodies.

A new streamlined shell (HE Mk 1D) was also introduced to increase maximum range from 6,000 metres (6,600 yd) of the older three CRH (calibres radius head) models to 6,700 metres (7,300 yd).
The 4.5-inch (110 mm) ammunition was separate loading, the shell and cartridge were loaded separately, with charge bags being removed from the cartridge as necessary.  The full charge was charge five, i.e. the cartridge case had an irremovable charge (one) and four incremental bags.  Shells were delivered fuzed.  In 1914 the ammunition scale for 4.5-inch howitzers was 70% shrapnel and 30% HE.
New types of shell were introduced during the First World War.  These were chemical at the end of 1915, incendiary shells in 1916 and smoke shells in 1917.  Smoke shells were phosphorus filled with both steel and cast iron bodies.
A new streamlined shell (HE Mk 1D) was also introduced to increase maximum range from 6,000 metres (6,600 yd) of the older three CRH (calibres radius head) models to 6,700 metres (7,300 yd).
QF 4.5-inch howitzer