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Dwight Gruber · 01-13-2006, 05:40 PM

In a discussion last year on Jan Still's Forum it was reported that the purpose of the chamber step is to provide a positive gas seal and thereby reduce chamber fouling. Also, it is a more complicated--and more expensive--to manufacture than a straight-cut 9mm chamber.

Here's the address of the discussion http://luger.gunboards.com/topic.asp...s=chamber,step

The dent in the case mouth comes from the fact that the ejector is in the side of the receiver extension. As it begins to remove the spent shell from the breechblock it pushes the shell sideways, where the mouth hits the opposite reciever rail on its way out.

--Dwight

01-13-2006, 05:40 PM	#3
Dwight Gruber User Join Date: Jun 2002 Location: Portland, Oregon Posts: 3,908 Thanks: 0 Thanked 1,330 Times in 435 Posts	In a discussion last year on Jan Still's Forum it was reported that the purpose of the chamber step is to provide a positive gas seal and thereby reduce chamber fouling. Also, it is a more complicated--and more expensive--to manufacture than a straight-cut 9mm chamber. Here's the address of the discussion http://luger.gunboards.com/topic.asp...s=chamber,step The dent in the case mouth comes from the fact that the ejector is in the side of the receiver extension. As it begins to remove the spent shell from the breechblock it pushes the shell sideways, where the mouth hits the opposite reciever rail on its way out. --Dwight