.450 Bushmaster
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The.450 Bushmaster is a rifle cartridge developed by Tim LeGendre of LeMag Firearms, and licensed to Bushmaster Firearms International. The.450 Bushmaster is designed to be used in standard M16, M4, a
.450 Bushmaster (left), .223 Remington (right)
The .450 Bushmaster was developed for big game hunting with modern rifles.
.450 Bushmaster single-stacks in magazines, unlike .223, which sits in two staggered columns
.450 Bushmaster cartridges and components
.223 Remington
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The.223 Remington, also known as 223 Remington by SAAMI and 223 Rem. by the C.I.P., is a rimless, bottlenecked, centerfire intermediate cartridge. It was developed in 1957 by Remington Arms and Fairch
.450 Bushmaster
…is descended from the Thumper concept popularized by gun writer Jeff Cooper. Cooper was dissatisfied with the small-diameter bullet 5.56×45mm NATO (.223 Remington) of the AR-15, and envisioned a need for a large bore (.44 cal or greater) cartridge in a semi-automatic rifle to provide one-shot kills on big-game…
A variety of .223 Remington cartridges with a .308 Winchester (right) for comparison
From left: .222 Remington, .223 Remington, and 5.56×45mm NATO
(Left to right) .223 Remington, .243 Winchester, .308 Winchester
10.4mm Swiss Vetterli Winchester