develop a boattail end 34 of the projectile thereafter as depicted in the figures a disc like cap 16 is also placed within the interior of the jacket contiguous to the end 21 of the core thereupon the opposite end 22 of the jacket and core along with the enclosed cap are die formed to provide an inwardly tapered section 35 of the projectile this latter die forming operation serves also to squeeze the cap radially inwardly of the jacket causing the cap to be deformed see fig3 e and securely captured within the jacket to form a fixed partition across the diametral dimension of the jacket and contiguous to the end 21 of the core and thereby anchor the cap within the jacket and contiguous to the end 21 of the core most commonly the taper 35 is a curved taper which has a radius that is a function of the outer diameter of the jacket for example the taper may be an 34 eight ogive 34 taper meaning that the taper has a radius of curvature that is eight times the outer diameter of the jacket this taper generally is chosen as a function of the intended performance of the projectile for example a longer taper.