In {HEAD ~ a sabot projectile}, {TAIL ~ a projectile core} is held fast in a sabot 
In { HEAD ~ a sabot projectile } , { TAIL ~ a projectile core } is held fast in a sabot
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH