Method for enhancement of the flight path of an ammunition projectile and product
View Patent ↗Method and apparatus for the production of an ammunition projectile having enhanced properties relating to delivery of the projectile along its flight path from a weapon to, and upon striking, a target by reason of the formation of a meplat cavity in the leading end thereof which, from projectile to projectile, exhibits a uniform size, uniform geometry and which is free of extraneous material, and which is concentric with the centerline (spin axis) of the projectile. A round of ammunition is disclosed.
1. A method for enhancing the flight of a projectile from a weapon comprising the steps of:
(a) providing a die having an elongated cavity with a substantially straight cylindrical inner wall and open top and bottom ends,
(b) closing the bottom end of said die cavity with a reciprocating bottom punch having an inboard distal end,
(c) providing a projectile including a jacket housing a core therein and having a leading end and a trailing end and an ogive formed on said leading end thereof,
(d) inserting said projectile into said die cavity with said trailing end of said projectile in supported engagement with said inboard distal end of said bottom punch, the depth of said die cavity being preferably slightly greater than the overall length of said projectile so that essentially all of said projectile is disposed substantially within said die cavity,
(e) providing a top punch adapted to be reciprocally received within said top end of said die cavity with its longitudinal centerline disposed concentric with the longitudinal centerline of said projectile disposed within said die cavity, said top punch including an inboard distal end having a substantially conical depression extending concentrically inwardly along the length of said top punch and a generally conical projection disposed concentrically of said depression and having a projected planar base located at the pinnacle of said depression and its own pinnacle terminating inboard of said projected planar base of said depression,
(f) inserting said top punch into said top end of said die cavity adjacent said leading end of said projectile to the extent that said projected planar base of said depression and said pinnacle of said projection engage said leading end of said projectile, and,
(g) urging said top punch toward said bottom punch with resultant entry of said projection of said top punch into said leading end of said projectile and displacement of extraneous material disposed within said leading end of said projectile at least laterally of said inwardly moving projection within that portion of said leading end of said jacket which is not occupied by said core, thereby defining a generally conical meplat cavity of uniform size and geometry in said leading end of said projectile which is void of extraneous material and disposed concentrically with respect to the longitudinal centerline of said projectile and simultaneously defining a uniformly sized outward opening for said meplat cavity which also is concentric with the longitudinal centerline of said projectile and which defines a smooth surfaced annular outboard face of selectable wall thickness, on said projectile.
2. The method of claim 1 and including the step of interposing a disc within said jacket and in overlying relationship to said leading end of said core.
3. The method of claim 1 wherein said extraneous material is also displaced vertically upwardly within that portion of said leading end of said jacket which is not occupied by said core.
4. The method of claim 1 wherein said pinnacle of said projection terminates substantially coplanar with said projected planar base of said depression.
5. The method of claim 1 and including the further step of burnishing said meplat opening.
6. The method of claim 1 and including the further step of tipping said leading end of said projectile following formation of said meplat cavity.
7. A projectile manufactured in accordance with the method of claim 1 .