5.56 to .223

[Seesm]

I have a idea but not for sure on how it works... But The reason I am asking is I have heard different things from different people.

So any help would be great... Thanks

Ok here goes.

Will a 5.56 chamber up and shoot ok in most Ar's, Mini 14's or other .223 caliber guns?

I am pretty sure the .223 will chamber up fine in the 5.56 but not sure on the other way around.

I have bought .223 but never really looked at or for 5.56 (How much cheaper is the 5.56?)

It is more powerful usually than the .223 from what I have heard but curious of other downfalls or benefits...

Is it hard to get as well...?

Thanks for any and all info...

[freakshow10mm]

Do NOT fire 5.56x45mm in .223 chambers!! They are NOT the same.

.223 will safely fire in a 5.56x45 chamber.

5.56x45 will NOT safely fire in a .223 chamber.

Check out the ammo oracle for more information.

[bruceflinch]

Correctomundo Freakshow.

Check out any reloading manual for the case specs on the 5.56 & .223. The shoulders are angled different.

[Seesm]

That is what I had heard butI tried buying some ammo and the sellers said oh it's just "hotter" so goood I did not try it...

What a bummer seems like the 5.56 would be the better chamber to have...

How about a super worn out .223 chamber? JK

[Synergy]

This is why the Wylde chamber came to be.

[Seesm]

HHmmm thanks I did not know that... I suspect the Wylde is just the 5.56 or a larger .223?

[slick_711]

Wylde is just a compromise between the two. 5.56 ammo is fine in ARs, Mini-14s, and any MAK-90 (AK variants chambered in .223).

I come from the other side of the fence where people believe 5.56mm x 45 and .223 REM are the same thing. Perhaps they were different in 1970. Perhaps there are still some residual pressure differences in the loads. But the main difference is in the chamber itself, and most .223 guns are built fairly heavy duty so it shouldn't be a problem.

But then, how many people really have one of each? And how difficult is it to know the difference and use the correct ammo? Not many, and not very. So I don't understand why it comes up so often and bothers people so much.

[freakshow10mm]

The 5.56x45 operates at a higher pressure than .223 Remy commercial ammo. However, oddly enough, the .308 Winchester ad 7.62x51 NATO are the exact same in every dimension, except in this cartridge the commecial .308 Win is loaded to higher pressure than the military 7.62x51.

[mif_slim]

Heres a site you can check out to know everything you need to know about 5.56 and .223.

http://www.razoreye.net/mirror/ammo-oracle/AR15_com_Ammo_Oracle_Mirror.htm

[grywlfbg]

http://ammo.ar15.com/ammo/

[ar15barrels]

This is why the Wylde chamber came to be.

The wylde chamber came-to-be because of highpower shooters wanting to shoot 77gr and 80gr bullets.

It just "happens" to be a good alternative for 223/5.56 too.

[ar15barrels]

HHmmm thanks I did not know that... I suspect the Wylde is just the 5.56 or a larger .223?

Wylde is basically a 5.56 chamber, with a tight throat.

http://ar15barrels.com/data/223-556.pdf

[ar15barrels]

The 5.56x45 operates at a higher pressure than .223 Remy commercial ammo.

I would argue that point.
US military spec 5.56 is loaded to 223 Rem SAAMI specs.
NATO spec 5.56 is loaded hotter than 223 Rem.
As all the ammo produced for the US military to buy it would need to meet the US specs and not the NATO specs, it's safe to use any US mil-spec 5.56 in a 223 chamber.

[ar15barrels]

99% of the time, there's no problem in using 5.56 ammo in a 223 chamber.
It's possible that you may be one of the 1% crowd.
Proceed slowly and watch for anything irregular.

[Seesm]

HHmmm so your saying I have a chance...? Thanks... Has anyone ever shot 5.56 in a Mini 14?