Thread: To continue my education on AR15s 223 chamber v 5.56mm

Honestly it really doesn't make much difference accuracy wise between 223 and 5.56. The NEAs in 5.56 are bloody accurate according to the majority of people with them, which tends to suggest that 5.56 guns do shoot just fine. Accuracy is more likely to be degraded by chrome-lined barrels, non-floated tubes, or running cheap ammo, or trying to shoot heavy projectiles in a 1:12 or 1:9 barrel, than by running a 5.56 chamber.

If you're really worried about accuracy, you'd be looking at a wylde or other proper 223 match chambering anyway.

Like dogmatix said, the main bonus with a 5.56 chambered gun is that you don't have to worry about going over 223 pressures, and can run any 5.56/.223 ammo without having to give it any thought. For those who like running hot loads, this might be a good thing.