The target (an enemy soldier) is about 1.8m tall and got a capsule with a radius of 34. So more or less like your avrage Unreal manequin.
Nothing unorthodox going on. Enemy soliders approch friendly soldiers. Detects them, stop and shoot. Bullet spawn, travel and hit. Friendly fire can occur but shouldn’t give a different result.
I guess this is the bullet hierarchy
Simulate Physics is not checked on neither Bullet nor Soldier.
Soldier
Bullet