Low velocity expanding projectile

Details Low velocity expanding projectile Low velocity expanding projectile

1985-06-10

1986-09-09

Goldberg, Howard N.

Metal working

Bias cutting of tubular stock

102509, B21K 2106, F42B 1110

Patent

active

046100610

ABSTRACT:
A projectile for a centerfire cartridge that achieves maximum energy transfer with limited target penetration when fired from snub-nosed pistols. A hollow point lead bullet is provided with an aluminum jacket of sufficient hardness to avoid fouling the pistol barrel and which allows the cartridge containing the projectile to feed reliably in auto-loading pistols and yet does not restrict normal expansion of the bullet upon impact with the target. The jacket extends into the nose recess of the bullet and covers the peripheral portion of the bullet base, whereby the jacket is securely fastened to the bullet and separation subsequent to impact is prevented. The jacket is uniformly notched at the nosetip annulus to weaken the aluminum jacket and promote upset at surprisingly low impact velocities.
A method of fabricating the projectile is also disclosed in which a cup-shaped aluminum jacket is partially filled with a lead core and simultaneously the cup base is notched before being formed into a hollow point bullet nose configuration. The notches can thus be uniformly controlled in contrast to slitting or cutting before or after forming in which the sharpness and force applied to the cutting knife governs the size of the slit or cut in a hard to control fashion.

REFERENCES:
patent: 1135357 (1915-04-01), Ayne
patent: 1633168 (1927-06-01), Dickerson
patent: 1833645 (1931-11-01), Hartz
patent: 2573634 (1951-10-01), Whipple
patent: 2838000 (1958-06-01), Schreiber
patent: 3143966 (1964-08-01), Burns, Jr. et al.
patent: 3349711 (1967-10-01), Darigo et al.
patent: 4193348 (1980-03-01), Halverson

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