a sabot having {HEAD ~ a front end face} with {TAIL ~ 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 
a sabot having { HEAD ~ a front end face } with { TAIL ~ 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
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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