Cartridge extraction for a cased telescoped ammunition firearm

A firearm configured to fire cased telescoped (CT) ammunition cartridges, the firearm comprising:

• a barrel;
• a split chamber configured to radially support a CT cartridge along a full length of the CT cartridge at the time that the CT cartridge is fired, the split chamber including i) a dynamic rear chamber portion defining a pocket in a bolt face of a bolt, the bolt operable to load the CT cartridge into the split chamber for firing, and ii) a static front chamber portion that is integral to the barrel and separate from the bolt;
• a cartridge extraction mechanism that extends around a portion of a circumference of a radial wall of the pocket in the bolt face of the bolt, and is configured to a) engage the CT cartridge within a width of an extractor groove in the CT cartridge prior to the CT cartridge being fired, and b) hold the CT cartridge in the pocket defined in the bolt face of the bolt after the CT cartridge is fired as the bolt moves rearward to pull the CT cartridge rearward out of the static front chamber portion and into an ejection position within the firearm, wherein the cartridge extraction mechanism engages the extractor groove of the CT cartridge with an arcuate surface of a front end of the cartridge extraction mechanism, and wherein the arcuate surface of the front end of the cartridge extraction mechanism has an arc that matches a contour of an inner surface of the extractor groove of the CT cartridge;
• and
• an ejector configured to eject the CT cartridge from the pocket defined in the bolt face of the bolt upon the CT cartridge being pulled into the ejection position.