the ballistic implant to provide improved accuracy while some composition description has been provided for further details of the bullet formulations see the earlier referenced patents each of which are incorporated herein by reference the payload 22 of the ballistic implant is a solid dose medicament again such solid dose medicaments are known and reference is again made to the above mentioned patents however generally the solid payload may be comprised of adjuvants conventionally employed in preparing tablets by direct compression such as lubricants disintegrants fillers and of course the solid medicament useful solid particulate biologically active medicaments that may be used in preparations of the present type include hormones minerals vitamins antibiotics antigens antibodies and other medicinals such as tranquilizers and dewormers with reference to fig2 the interior wall 24 of cavity 18 can be seen as illustrated interior wall 24 has a series of parallel annular puller rings puller rings are concentric parallel ridges 28 which can be made by the core pins and dies used in making the projectile casing usually by an injection molding or casting process while annular ridges 28 of puller rings are shown in fact any means of raising projections for frictional engagement enhancement of the inner wall 24 surface of the interior cavity 18 can be utilized conceivably any non smooth discontinuity in the form of which provide a frictionally engagement enhancing surface would suffice examples might include ridges bumps nodules grooves etc certain constructional features may be worthwhile to mention specifically typically for ballistic implanting applicant has found a standard 25 caliber bullet suitable length of the bullet doesn 39 t appear critical bullets of.