Jacketed boat-tail bullet
A bullet includes at least a mid core and a rear core in tandem alignment. The hardness of the mid core is greater than the hardness of the rear core. A jacket envelops both the mid core and the rear core. The jacket has a generally cylindrical sidewall, which is in contact with the mid core, and a boat-tail, which is in contact with the rear core. The rear core is substantially contained within the boat-tail. The mid core and the rear core may be substantially lead-free. In one embodiment, the bullet includes a front core in tandem alignment with the rear core and in contact with a nose portion of the jacket. In another embodiment, the mid core extends from the nose portion of the bullet to the boat-tail.
1. A bullet comprising:
a front core;
a one-piece mid core that includes a substantially monolithic, non-tubular construction, the front core in tandem alignment with the mid core;
a rear core in tandem alignment with the mid core, the hardness of the mid core is greater than the hardness of the rear core;
a jacket enveloping the front core, the mid core and the rear core, the jacket having a nose portion, the front core being positioned adjacent to the nose portion;
an angularly indented rear portion forming a boat-tail; and
a generally cylindrical sidewall disposed between the nose portion and the angularly indented rear portion, wherein the generally cylindrical sidewall is in contact with the mid core and the boat-tail is in contact with the rear core, the rear core being substantially contained within the boat-tail.
2. The bullet of claim 1 , wherein the mid core and the rear core are substantially lead-free.
3. The bullet of claim 2 , wherein the mid core has a weight of about 38 grains and is formed from:
a high-density constituent material selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten;
a second, lower-density constituent consisting of either a metallic matrix material or a plastic matrix material; and
wherein the rear core has a weight of about 4.3 grains and is formed from tin or a tin base alloy.
4. The bullet of claim 1 , wherein the rear core substantially fills the boat-tail.
5. The bullet of claim 1 , wherein the front core is formed from steel.
6. The bullet of claim 5 , wherein the mid core has a weight of about 30 grains and is formed from:
a high-density constituent material selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten;
a second, lower-density constituent consisting of either a metallic matrix material or a plastic matrix material; and
wherein the rear core has a weight of about 4.3 grains and is formed from tin or a tin base alloy.
7. The bullet of claim 1 , wherein the mid core is formed from:
a high-density constituent material selected from the group of tungsten, tungsten carbide, carballoy, and ferro-tungsten; and
a second, lower-density constituent consisting of either a metallic matrix material or a plastic matrix material.
8. The bullet of claim 7 , wherein the metallic matrix material is selected from the group consisting of: tin, zinc, iron, copper, and mixtures or alloys of one or more of the foregoing.
9. The bullet of claim 7 , wherein the plastic matrix material is selected from the group consisting of: phenolics, epoxies, dialphthalates, acrylics, polystyrenes, polyethylene, or polyurethanes.
10. The bullet of claim 1 , wherein the mid core is formed from one of: copper, bismuth, tin, gold, silver, pewter, bronze, and mixtures or alloys including one or more of the foregoing.
11. The bullet of claim 1 , wherein the mid core is formed from an organic polymer filled with a metal.
12. The bullet of claim 1 , wherein the rear core has a Brinell hardness less than about 50.
13. The bullet of claim 12 , wherein the rear core is formed from tin or a tin base alloy.
14. The bullet of claim 12 , wherein the rear core is formed from one of: copper, zinc, tin, and mixtures or alloys including one or more of the foregoing.
15. The bullet of claim 1 , wherein a transition point between the generally cylindrical sidewall and the boat-tail is formed by a rebate in the generally cylindrical sidewall.