ok so here is the deal......a while back i was given a rifle by my grandfather. only thing he told me about it was that it was his dads, and it was a 30-06. i have done some research and found that it is a mauser 98 action, is set into a "jimmy rigged" stock that doesn't fit well at all (and is cracked almost the full length of the foreend) and is in fact NOT a 30-06 (tried to chamber a 30-06 round and the bolt would not fully lock into place) :shrug: anyways, i want to make it my new project and have found some replacement parts to get me started. but here is the real question...........how do i figure out what caliber it is?? only idea i had to help so far is taking my digital caliper and measuring the inner diameter of the end of the barrel. it measures 0.306 inches or 7.78mm. any help would be greatly appreciated:beer: