Originally Posted by James H
For those that don't know.
The bore diameter of a 7mm/.284cal is .277 hence the 7mm designation.
I agree with James.
Example: 308win has a bullet diameter of .308 but the bore diameter is .300 which converts to 7.62mm as everyone knows.
So when it comes to the 270win sure the bullet diameter is .277 = roughly 7mm but the bore diameter is still only .270 so that means that the .270win is not the real 7mm but it is the real 6.8mm if that helps.
So next time someone has an argument about this ask if there talking about the bullet diameter or the bore diameter.
I don't really care one way or another but I'm glad I read this thread anyway because finding out that berger has a .277 150gr VLD kicks ass!!!!!