Hi, I want to make a 9.3x62 Mauser barrel, like used on the Type A, and with the configuration in the picture. I have dimensions for barrels that do not have the extra step in front of the rear sight base; they seem to be .900 diameter just in front of the rear sight. If anyone has one of this type with the double step, I would appreciate it if you could please give me some measurements of that area. Thanks in advance for any help. I have the Lothar Walther dimensions but I do not know what caliber rifle it came from, and I have the drawing from Speed's book; that is for up to 9mm.
Picture does not show up from photobucket; I can't fathom why.

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