Centerfire ammunition is available invarious calibers, ranging from small calibers used for small game hunting to large calibers used for big game hunting and long-range shooting. Most common rounds are centerfire rounds, including 9mm, .45 ACP, and .223 Remington. There’s also a huge number...
And what is the main difference between centerfire and rimfire ammunition anyway? Big spoiler…. powder, and power. (left to right) .22 LR, 9mm, .45 ACP, .38 SPL, .357 Mag, 7.62×39 Soviet, 5.56 NATO, 6.5 Creedmoor, and .308 Winchester Love Ammo? Get My Cartridge Comparison Handbook!
As an aside, both machine guns used .45 ACP rounds. Way back in 1956… Armalite was one of the companies invited to meet this challenge, and their first AR-15 build was completed in 1956. It was actually a scaled-down version of their already popular AR-10. In essence, the core ...