Cased telescoped ammunition firearm with translating chamber

A weapon for firing cased telescoped (CT) ammunition rounds in quick succession, comprising:

• a barrel;
• a chamber member that defines a chamber configured to hold a CT round for firing from the weapon, the chamber member moving between a firing position in which the chamber member is aligned with the barrel for firing the CT round and an ejection/loading position in which the chamber member is not aligned with the barrel for ejecting a spent CT round and receiving a next CT round, the chamber member being biased toward the firing position;
• and
• a carrier assembly coupled with the barrel and the chamber member, the carrier assembly being configured and operative in a single trigger-initiated firing cycle to (1) perform a recoil in which a carrier and fixed rammer of the carrier assembly move rearward from a battery position to bring the next CT round into a ramming position and to move the chamber member from the firing position to the ejection/loading position in line with the next CT round, and (2) perform a subsequent counter-recoil in which a firing pin of the carrier assembly is returned to the battery position and the fixed rammer pushes the next CT round into the chamber as the chamber member is held in the ejection/loading position, the counter-recoil ending with release of the chamber member for biased return to the firing position for a next trigger-initiated firing cycle,
• wherein the chamber member is retained in chamber carrier of a chamber carrier assembly, the chamber carrier assembly including springs coupled between the chamber carrier and a receiver member of the weapon to provide the biasing of the chamber member,
• and wherein the carrier assembly is coupled to the chamber carrier by a camming arrangement causing the chamber carrier to be moved against the biasing of the springs to the ejection/loading position, the camming arrangement enabling return of the carrier assembly to the firing position without corresponding movement of the chamber carrier.