 Brandt claimed that its explosive charge possessed an efficiency comparable to that of an 81mm mortar bomb.The LR gun-mortar could also fire any of the standard 60mm ammunition produced for French infantry mortars, including the Mk 72, Mk 61, and Mk 35/47 high-explosive projectiles, as well as the Mk 63 illumination shell.However, without the specialized ammunition indirect fire range is reduced to 3,000 metres and direct fire range to 400 metres.