.223 rem

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The .223 Remington rifle cartridge was developed in 1957 as a commercial hunting bullet for small mid-sized game. Today it is one of the worlds most widely used cartridges and is a favorite with kiwis too.

Rifling is expressed as a ratio. A 1 in 12″ ratio means that rifling is cut so that the bullet rotates 360° after having traveled 12 in. This is expressed as 1:12 spoken as 1 in 12 inches. Rifling must match the bullet design (length, weight, and projectile shape), which a shooter intends to use, to maintain accuracy.

Many type rifles use 1:9, which is suitable for bullets up to 69 grains or 4.5 grams or 1:7, which is suitable for bullets up to 85 grains or 5.5 grams. Many rifle owners choose to build their own rifles, which is facilitated by a huge variety of barrels and other components. Barrel length range from 7.5 in (which may be classed as a pistol, if lacking a stock) to as long as 24 if used in hunting rifles primarily.


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