{HEAD ~ Manual replacement} of targets requires {TAIL ~ the shooter} to move downrange in a position in front of the muzzle of the firearm, both theirs and others 
{ HEAD ~ Manual replacement } of targets requires { TAIL ~ the shooter } to move downrange in a position in front of the muzzle of the firearm , both theirs and others
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH