Just guessing, I betcha it is a converted 303, that is, converted from a valueless P14 to a very nice and valuable hunting rifle. Hey, at the time it was a very cheap surplus " Brit " rifle. I doubt if it was a 303 converted to .308, Of course it could be a reworked Model 17 in 30-06. Brother Wolf, please get back to us with more information. You can't leave us hanging like this.