Firearms

A barrel of the type described, wherein:

• each trailing projectile has a sealing portion extending about a tapered anvil portion and arranged in sealing engagement with the barrel bore and moveable forwardly therealong for operative freeing from the anvil portion;
• a spine extends from each anvil portion placing the anvil portions in columnar relationship with the barrel, and
• the rear part of each sealing projectile is exposed to their respective propellant charges for forward propulsion relative to the anvil portion about which they extend when forward movement of such anvil portions is resisted.

A barrel of the type described, wherein:

• each projectile includes a sealing portion extending about a tapered anvil portion and loaded into the barrel with high barrel engaging forces by relative forward movement of the sealing portion along the anvil portion;
• each projectile includes a hammer member supported for free forward movement into a cavity formed in the exposed rear end of the anvil portion, and
• each hammer member being exposed, in use, to its ignited propellant for forward acceleration to impart its energy to the anvil portion by impact so as to jolt the anvil portion from operative sealing engagement with the sealing portion.

A barrel of the type described, wherein:

• each projectile includes a sealing portion extending about a tapered anvil portion and loaded into the barrel by relative forward movement of the sealing portion along the anvil portion;
• each projectile includes a pressure sensitive leverage system connected between the anvil portion and the sealing portion which operates when pressures in the barrel behind the projectile increases beyond a safe operating pressure to lever the sealing portion rearwardly along the anvil portion to a disengaged position.

A barrel assembly substantially as hereinbefore described with reference to either of the accompanying drawings.