Webjul 19, 2024 · how is one put together? Why is a. 243 bullet the same diameter as one fired from a 6mm rifle? Let’s look at some specifics about cartridge construction and naming. Webapr 5, 2023 · “caliber” is a measurement in inches of the internal width of a firearm’s barrel, and consequently the width of the bullet. A larger caliber such as. 308″ means the bullet is physically wider than a bullet such as a. 22″. Understanding sizes, types, and calibers. From the humble. 22 lr to the…