LugerForum Discussion Forums - View Single Post - Extra step in chamber: Has anyone seen this before?

Ron Wood · 01-11-2016, 10:34 PM

The chamber step is a feature of the original design of the 9mm Parabellum, going back to 1903. It was included in 9mm P08s until 1940-41 when Mauser eliminated it, making the chamber in one machining step rather than two. The step was intended to act as a gas seal when the cartridge case expanded upon firing, keeping the greater part of the chamber free from powder fouling. Mauser eliminated the step primarily for two reasons, the introduction of steel cased ammunition and it made machining easier.
Ron

01-11-2016, 10:34 PM	#2
Ron Wood Moderator 2010 LugerForum Patron Join Date: Jun 2002 Location: Santa Teresa New Mexico just outside of the West Texas town of El Paso Posts: 7,040 Thanks: 1,106 Thanked 5,257 Times in 1,724 Posts	The chamber step is a feature of the original design of the 9mm Parabellum, going back to 1903. It was included in 9mm P08s until 1940-41 when Mauser eliminated it, making the chamber in one machining step rather than two. The step was intended to act as a gas seal when the cartridge case expanded upon firing, keeping the greater part of the chamber free from powder fouling. Mauser eliminated the step primarily for two reasons, the introduction of steel cased ammunition and it made machining easier. Ron Attached Thumbnails Attached Images __________________ If it's made after 1918...it's a reproduction