Are you talking about a firework mortar round? Because a military 60mm, 81mm, etc. mortar round will most definitely blow a leg off...turn you into paste if you're in the kill radius.
Scouts Out! Cavalry Ho!
>Are you talking about a firework mortar round?
Yup. The biggest firework mortar round is usually 25-40g of gunpowder. Nothing like the real stuff.