I just got a 68-69 vintage Model 760 in .30-06. It has two magazines, but one is marked .270. In an earlier post, more than one responder said that the mags are caliber specific. Yet, the new manufacture mags that will, supposedly, fit this rifle have several calibers stamped into the side of the mag. I assume that means that the mag will accomodate multiple cartridges. I am confused. Can anyone shed some light ???????