I was seaching the web tonight and found a copy of the U.S. Army Ordnance Corps "Manual For Soviet Mosin-Nagant - Manual For Rifles & Carbines" ORDI 7-101 from May 1954 available for download and/or printing. This is Chapter 2 "Bolt Action Rifles and Carbines" of that manual. Here is the link: http://www.globalsecurity.org/military/library/report/other/mosin.pdf
Dont hold me to this, but as far as I have seen , the two ways of adjusting the headspace is either have a huge parts bin of bolts and keep trying them in the rifle until you get one that passes, and the other way is to adjust the barrel (screw it in or out) which needs to be done by a gun smith and I am sure would cost a lot more than the gun itself. That I why I always ask if people have had the shop where they bought the gun checked the headspace before they bought it. Its the same with the cheaper mausers
