Original sentence: In early 1903 their first report dismissed the 4.7 inch (120 mm, used in South Africa) and the 30 pounder (used in India) from further consideration because they lacked firepower.In the 1930s some carriages were converted to the new 4.5 inch (114 mm) BL ordnance to become BL 4.5 inch Gun Mk 1 on Carriage 60 pr Mark IV and IVP, which then started replacing 60 pounder
Edited sentence: In early 1903 their first report dismissed the 4.7 inch (120 mm, used in South Africa) and the 30 pounder (used in India) from further consideration because they lacked firepower.In the 1930s some carriages were converted to the new 4.5 inch (114 mm) BL ordnance to become BL 4.5 inch Gun Mk 1 on Carriage 60 pr Mark IV and IVP, which then started replacing 60 pounder