<prompt> Use of wadding in a smooth bore gun rifle produces all except -Causes fatal injuriesHelps in lubricationOptimum pressureSealing the air  <response>: Functions of wad are:-i It separates the projectiles from propellant.ii It seals the bore effectively.iii It prevents expanding gas from escaping, andiv It allows optimum pressure to develop.The felt wad is impregnated with grease and this lubricates the bore. 