Caliber size metric vs. standard question

CRMarks

Member
Joined
Dec 30, 2017
Messages
50
Location
Arizona
Can someone explain why a 6.5 mm caliber is a bullet diameter of 0.264" in the standard unit system? Since the metric to standard conversion is 25.4 mm = 1 inch, I keep getting that a 6.5 mm bullet should be 0.256". Am I missing something on bullet dimension measurements? I'll confess to not having any experience in handloading and I'm certainly no expert in cartridge construction.
 

CRMarks

Member
Joined
Dec 30, 2017
Messages
50
Location
Arizona
Awesome, thanks! That has been bugging me for awhile. Learn something new every day on here.
 
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