Maybe he shoots an old Argentine Mauser.I personally laughed when I encountered a former USMC and he said he shoots 7.62x53...no joke. I just kind of chuckled and then looked on his facebook wall and saw that he gave personal firearm lessons. One of his calibers was.....you guessed it=7.62x53. WOW
[URL]http://en.wikipedia.org/wiki/7.65×53mm_Argentine[/url]
Well, it's the closest I know of (7.62 vs 7.65).