I dont really stay up to date on my fire arm knowledge. I only have three guns that I fire regularly. I decided I wanted to match rounds to guns that I have. I have three sets of rifle rounds marked as follows... "match 56", "30-06" (this one I do know), "110 hornaday". I know I have a .06, but the other rifle is confusing.. The only mark is right at the bolt end of the barrel and it says ".256", but the "match 56" and "110" rounds look almost the same (one has a rounded tip, the other pointed), and both fit and chamber fine in the ".256". So my question is... Is there such a thing as a .256? When I first got this gun, I went to a sporting goods store and the guy looked at me kinda weird. This gun is beautiful!! Almost like a mahogany wood stock (very striped), and a compass in the bottom of the hand grip. Any input??