Chamber Nested Bolt and Oval Rifling

Abstract

A means of keeping the cartridge in the chamber during the firing sequence until the peak pressure drops to a safe level by nesting the bolt into the chamber with the cartridge. The bolt and cartridge will form a gas seal and recoil backwards when the gun is fired, but the chamber walls will support the cartridge while it recoils backwards until it exits. The gun will be designed so that it does not exit until the pressure drops to a level where the cartridge can withstand the force. Doing this will allow the gun to utilize high pressure ammunition without requiring complicated locking and/or delay mechanisms currently used. This will decrease the initial cost of manufacturing the gun, improve accuracy and reliability, and reduce the peak recoil felt from the gun. Also spinning a projectile by using an oval cross section where the major and minor axis rotates around the center of the oval eliminates the need for groves and polygonal rifling. This will increase the efficiency and the precision of the gun.

1 . A gun comprising:
 a. a barrell;   b. a chamber that is longer than the cartridge;   c. a bolt/carrier unit that is partially or completely nested inside the chamber prior to the cartridge being fired;   
     
     
         2 . A barrel comprising:
 a. a oval cross section that forces the projectile to spin by rotating the major and minor axis;   
     
     
         3 . A gun as set forth in  claim 1  that utilizes a existing methods of recoil control in addition to the nested bolt: 
     
     
         4 . A gun as set forth in  claim 1  that fires from a open bolt or partially open bolt: 
     
     
         5 . A gun as set forth in  claim 1  that utilizes a closed bolt configuration: 
     
     
         6 . A gun as set forth in  claim 1  that utilizes a damper or a dashpot to control the rate of recoil and return of the nested bolt: 
     
     
         7 . A gun as set forth in  claim 1  that can operate in a single shot, semi-automatic, or fully automatic configuration: 
     
     
         8 . A gun as set forth in  claim 1  that incorporates part of the chamber with the bolt carrier unit to increase the mass of the slide: 
     
     
         9 . A gun as set forth in  claim 1  that uses the friction generated between the cartridge and the chamber during blow back to slow the bolt: 
     
     
         10 . A gun as set forth in  claim 1  that has deformations on the surface of the chamber to increase the friction between the chamber and the cartridge: 
     
     
         11 . A barrel as set forth in  claim 2  that utilizes gain twist rifling to distribute the torque over a longer period: 
     
     
         12 . A barrel as set forth in  claim 2  that utilizes freebore: 
     
     
         13 . A barrel as set forth in  claim 2  that utilizes a gradual transition between the chamber the oval barrel: 
     
     
         14 . A barrel as set forth in  claim 2  that utilizes a oval shaped chamber in addition to a oval shaped barrel: 
     
     
         15 . A barrel as set forth in  claim 2  that utilizes projectiles with an oval cross section to minimize deformation: 
     
     
         16 . A barrel as set forth in  claim 2  that can fire delicate projectiles: 
     
     
         17 . A barrel as set forth in  claim 2 , that can fire hypersonic projectiles with a twist without damaging the rifling: 
     
     
         18 . A barrel as set forth in  claim 2  where the cross section is a ellipse: