The Firing Line Forums - View Single Post - Confused about these bore/bullet diameters

**Mal H** · June 16, 2000, 11:49 AM

I believe WW is correct. Most European rifle calibers are expressed in diameter of the bore and most American calibers are expressed in diameter of the bullet. But, he hastens to add, there is no hard and fast rule on this on either side of the pond.

June 16, 2000, 11:49 AM	#3
Mal H Staff Join Date: March 20, 1999 Location: Somewhere in the woods of Northern Virginia Posts: 16,947	I believe WW is correct. Most European rifle calibers are expressed in diameter of the bore and most American calibers are expressed in diameter of the bullet. But, he hastens to add, there is no hard and fast rule on this on either side of the pond.