[trigger643]

I have an erma/erfurt .22 subcalibre device for a 98k mauser (8mm) and the .22 subcalibre device for my hk93. Both of these are complete units which replace the bolt and chamber assembly and magazine (and in the case of the mauser, the insert runs the length of the barrel as well). Once I owned a Navy Garand that had been converted from 30-06 to .308 by means of a chamber insert. These inserts were available from a company in Idaho several years ago. The insert appears to be like the one in the link and consisted of a ring that reduced the shoulder length of .30-06 to the .308 and was tacked in place to prevent possible expulsion with a spent cartridge (a MUST with auto fed rifles). I would only recommend a competent gunsmith install or remove such a device. Currently, the Isreali 30-06 ball surplus has been pretty cheap. It is excellent ammunition and meets or exceeds NATO and US Govt. spec. and is about 1.25 MOA in my NM '03. I have also heard great things about a company called â??Georgia Ammoâ? or something like that, that remanufactures inexpensive high quality ammo (a friend is supposed to get me some of their .308 match which he swears is .25 MOA).