Can anyone I.D. this large ring Mauser for me? Country, History, etc,etc. Aquired it from pawn-shop. Looks to have military stepped barrel which has been turned down to approx #2 sporter contour. And is now chambered in 30-06. The only problem is, previous owner tried using one of those chamber bushings to convert it to 308win. Now the bushing is stuck (I do mean stuck) and a broken shell extractor will not work. Pawn shop owner figured it for junk and wanted to get rid of it. Offered $90 and got it.