Bushmaster Carbon: 5.56?

[Guest confidence]

I am new to AR's. Can my Bushmaster Carbon .223 shoot 5.56 ammo as well? Are the two rounds exactly the same?

 

 

:stare:

[Handsome Rob]

I'm new to them myself, but as far as I can tell, if it's chambered for 5.56 you can shoot 5.56 or .223.
If it's chambered .223, you can only shoot .223.

However, if it's marked as .223 Wylde, you can use 5.56 military spec.

[robbieg19]

The carbon Busmaster I had was marked 5.56 nato. I have seen two others that were both marked 5.56 nato. It should say on the right side of the lower just below the bushmaster logo.

[Oh Shoot]

The carbon Busmaster I had was marked 5.56 nato. I have seen two others that were both marked 5.56 nato. It should say on the right side of the lower just below the bushmaster logo.

 

Barrel is most universal place for the marking, usually tells twist too.

 

- OS

[robbieg19]

Barrel is most universal place for the marking, usually tells twist too.

 

- OS

 

This is true and a better place to look since the chamber is in the barrel and not the lower.

[whitewolf001]

5.56 has a slightly higher chamber pressure, making it incapable of being fired through .223.

[Tobashadow]

My Carbon is marked 5.56 on the lower and the barrel. I haven't ran 5.56 through it yet since it hasn't came up in my ammo rotation but I'm not afraid of it since it's rated for it.

So go for it

[Oh Shoot]

5.56 has a slightly higher chamber pressure, making it incapable of being fired through .223.

 

Meh.  If you believe SAAMI. CIP rates both .223 and 5.56 the same max pressure.

 

5.56 leade is longer to better accommodate longer bullets is real difference. If you're not shooting above 62gr,  probably not see any diff in long term throat wear by shooting 5.56 in .223 chamber.

 

Main reason you see .223 chamber specific anymore is for precision target and varmint use, as .223 is not as precise from a 5.56 chamber.

 

- OS

Edited May 22, 2013 by Oh Shoot