With some trepidation, I settled down behind the big rifle set on the benchrest used for sighting in. It was a brand-new rifle/scope combination that had been bore-sighted. My aiming point was an ...

The most common definition of “caliber,” as it pertains to guns, is about as straightforward as you could want it to be: Caliber simply mean the diameter of the hole in a rifle or pistol barrel. Yet ...