Since they were born back in the 1920s or earlier, they often hunted with rifles and calibers that most of today’s hunters younger than 55 years old may never have heard of or seen.

For example, a 16-inch/caliber gun of 50 calibers would have a barrel that was (16 caliber times 50) 800 inches long. Caliber also influences the shape and design of cartridge cases.

Special operators will soon have the Advanced Sniper Rifle with three different calibers to choose from on the same platform built by Barrett Firearms Manufacturing, a company well known for its ...

Among the 34 rifle calibers on this list, prices range from $2.00 to well over $8.00 per round. Many of these calibers are designed for hunting large and dangerous game in parts of Africa and Asia.

Too heavy to be lifted, the punt gun was fired from a rest in a one-man boat. The barrel was equivalent to a 1.3-inch caliber and could fire a load equal to about 40 standard 12-gauge shells.

The rifle, which is also used by U.S. Special Operations Command forces, includes caliber conversion options, allowing Marines to fine-tune their missions. Barrels can fire 7.62mm, .300 Norma ...