the problem is that there really is no rock solid documentation of that actual bore diameter of the carcano. most publications I've read says that it is a .268 diameter bullet where all other 6.5mm cartridges that I'm aware of use a .264 diameter bullet. but then I pull out my hornady reloading manual and 6.5 carcano-mannlicher is listed as a .264 bullet, more confusion. then I read a article in handloader magazine that says that all of the factory ammo for 6.5 carcano is actually .264 and is undersized and then i read reports of people taking a sizing gauge into a gun show and none of the carcanos present gauge to less than .272 so pretty much I would just tell you to shoot it and not worry about it...
apparently nobody knows what they are talking about anyway...
