CHAMBERS FOR THE 223 and 5
For the full history of the 5.56x45 cartridge, read the 5.56x45 Timeline, by Daniel Watters. 223 Remington vs. 5.56x45--Chambering and Throat Considerations. Is the .223 Remington the same as the 5.56x45? The answer is yes and no. There ARE differences between the .223 Remington as shot in civilian rifles and the 5.56x45 in military use. ................
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