I know for years the mexican mauser receiver was the hottest thing on the planet for building sporter rifles. If i remember correctly its has a 98 style bolt and a small ring receiver. Now the 7mm mauser round is a great round and its one of the most flattest shooting rounds there is but if your going to rebarrel it to another caliber its your choice. My only question is why the 7,65x53 round? Grafs has new brass for the 7,65x53 arg. and midwayusa has the Lee reloading dies. I still would like to know why the 7,65 round?