I seen a post on one of the forums with a link to the diffrences between the 2 does anyone have that link so I can read up on it.
M885 is current issue NATO 5.56 ammo it IS NOT SAFE to fire through a .223 chamber. Just for diversity reason I suggest you get the barrel chambered for 5.56 then you are good to shoot both and be safe. When I go qual at the range I get issued M855 everyday and our issue rifles are 5.56 nato chambered.I didnt get a barrel yet for my AR build so I really didnt even look into what most of them chamberd at? is the M855 safe to fire through a .223 chambered barrel? I see that cheaperthandirt has M855 surplus there its saying 5.56 and 223 so what is the M855 really made for?
Yes and no. If it is "varmint" barrel, target barrel, heavy barrel, anything designed for accuracy, it will generally be .223. The vast majority will be 5.56. There is also a Wylde chamber that mixes the two. a little tighter than a true 5.56, but still compatible with .223 without sacrificing as much accuracy.Would I be safe in assuming that most if not all AR manufacturer's do a 5.56 chamber?