The .223 Remington (.223 Rem) is a cartridge with almost the same external dimensions as the 5.56×45mm NATO military cartridge. The name is commonly pronounced either 223, two-two-three or two-twenty-three Remington. It is loaded with a 0.224-inch (5.56 mm) diameter jacketed bullet, SP or “ green tip” with weights ranging from 40 to 90 grains (2.6 to 5.8 g), though the most common loading by far is 55 grains (3.6 g). The 223 external case dimensions are very similar, the .223 Remington and 5.56×45mm differ in both maximum pressure and chamber shape. The 223 and or 5.56 maximum and mean pressures for some varieties of the 5.56 (different cartridge designations have different standards) exceed the SAAMI maximum for the .223 Remington, and the methods for measuring pressures differ between NATO and SAAMI. The 5.56 chamber specification has also changed since its adoption, as the current military loading (NATO SS-109 or US M855) uses longer, heavier bullets than the original loading. This has resulted in a lengthening of the throat in the 5.56 chamber. Thus, while .223 Remington ammunition can be safely fired in a rifle chambered for 5.56×45mm NATO, firing 5.56 ammunition in a .223 Remington chamber may produce pressures in excess of even the 5.56 specifications due to the shorter throat.
Designed by John Browning in 1904, the .45 ACP is an effective combat pistol round, combining accuracy and stopping power. Used in the Colt .45 pistol, the .45 ACP round was used by the US Army in 1911. The ACP stands for Automatic Colt Pistol, the .45 ACP is known for having low muzzle flash and blast and moderate recoil. Maine Ammo Company stocks a wide range of 45 ammo to satisfy the needs of plinkers, hunters, competitive shooters, and the avid ammunition aficionado. Being avid shooters ourselves, we enjoy trying out new 45 ACP ammo and try to offer you 45 ammo at very aggressive prices so that you can share in our most favorite pastime. when in a Maine Ammo store or online, ask about our 45 ACP “bad boy” round. This 45 ACP round will shock you.