I've seen the tank killer upclose at a gun show its bigger than we think.
If your not confused yet maybe this will do it;
http://www.hoosiergunworks.com/catalog/mauser_reference.htmlBookmark it and print it. Your welcome CZY
The mexican 7mm mausers used a 98 sized bolt in a small ring receiver thats why most were used for doing builds.
The turk '38 used a 98 sized bolt / reveiver with a small ring barrel.
I installed/replaced a german 98k with a sewer pipe bore with a Czech barrel and it went right in and locked inplace. It headspaced perfectly on the go -gauge too. The czech barrel was probably manufactured on german machinery anyway. The only difference there was is the handguard. I fitted the czech handguard to the german 98k stock for the perfect military looking sporter.
I had a turk '38 and a german '98k with the same exact bolts. The bolts were miss matched anyway but when the two bolts were switched they were tighter in the other gun when locked up. They were loose in there orginal receivers. They both headspaced ok in both guns.
The yugo m48 is a short bolt while the 98k bolts are a tad longer. There has been mag problems too with the receiver bolt spacing needing to be wider for the longer calibers. I believe that
www.e-gunparts.com offers the longer magazine bodies in some cases too.
I just picked up a 1894 FN 308 mauser(bubba) and installed a 308win to 7,62x39 chamber adapter and i have the magazine spacer and the shorter follower for the 7,62x39 round i got from e gun parts.