a segmented sabot utilizes a double ramp configuration and a centrally poioned obturating band in alignment with the center of gravity of an in - bore projectile to improve the uniformity of the shear traction forces at the interface between the sabot segments and a subcaliber projectile , to reduce propellant gas blow - by and to enhance projectile in - bore and trajectory stability . the increased uniformity of shear traction forces between sabot and projectile interfaces and propellant gas self - sealing design permits a reduction in sabot weight of sufficient magnitude to increase the velocity of the projectile at the muzzle exit .