Rimless Shotshell Cartridge and Shotgun Firearm System

A shotgun firearm, comprising:

• a barrel configured to accept a rimless shotshell cartridge,
• wherein the shotshell cartridge is configured with a hull comprising:
• a tubular one-piece nonmetallic body having an internal bore and an outer surface;
• the tubular body configured with a raised portion formed along a circumference of the outer surface at a first end of the body;
• the raised portion configured with an annular stop proximate the first end of the body;
• the raised portion configured with a radial groove formed along the circumference of
• the outer surface between the annular stop and the first end of the body;
• wherein the raised portion has a uniform outer diameter;
• wherein the barrel is configured with an annular stop surface configured to interact with the annular stop on the rimless shotshell cartridge hull;
• and
• a bolt configured with a recessed boltface to accept the first end of the rimless shotshell cartridge hull.

A magazine cartridge feeding device for a shotgun firearm, comprising:

• a walled body with an open upper end;
• the walled body configured to hold a plurality of rimless shotshell cartridges,
• wherein each shotshell cartridge is configured with a hull comprising:
• a tubular one-piece nonmetallic body having an internal bore and an outer surface;
• the tubular body configured with a raised portion formed along a circumference of the outer surface at a first end of the body;
• the raised portion configured with an annular stop proximate the first end of the body;
• the raised portion configured with a radial groove formed along the circumference of
• the outer surface between the annular stop and the first end of the body;
• wherein the raised portion has a uniform outer diameter;
• a spring loaded follower configured to push the shotshell cartridges toward the open upper end of the walled body;
• and
• wherein the walled body is configured for detachable engagement with a port in a shotgun firearm.