{HEAD ~ a sabot} having {TAIL ~ a front end face} with an annular groove therein, a smooth tapered annular zone extending rearwardly of said front end face and a circular groove to the rear of said annular zone 
having
{ HEAD ~ a sabot } having { TAIL ~ a front end face } with an annular groove therein , a smooth tapered annular zone extending rearwardly of said front end face and a circular groove to the rear of said annular zone
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH