223 vs 5.56

[spqrzilla]

Ah, but sleify, "I haven't blown myself up, yet" proves anything the commenter wishes to say.

The reality is that a lot of bad practices work just fine ... until the tolerances stack the wrong way. That's the way it is in the 5.56mm vs .223 Remington situation.

[Hoser]

how many people here believe that 223 and 5.56 are NOT actually the same?

just wondering too, how many people KNOW the difference between 300-221/ 300 whisper and 300aac?

A. On the outside the 223 and 5.56 are the same. The brass can be the also be the same, depends on the brass manufacturer or lot number and manufacturer of brass. The chambers (throat area) are different. The loaded ammo is also different. The 5.56 spec is much higher than 223.

b. The 300 Whisper, in its original form, has a thinner neck and corresponding chamber as the parent case is the 221 Fireball. Some early 300 Whisper chambers have an OAL case length of 1.400. This is way longer than the Blackout. 300 Whisper (what you see now) part two has a thicker neck/chamber to allow the use of cut down 223 brass. All flavors of the Whisper have a much shorter throat than the Blackout.

[sellersm]

please don't feed the troll...

[spencerhenry]

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


try this on for size.

5.56 and 223 are not loaded to different specs. the pressure is measure in different ways in different places, but it ends up the same.

[Hoser]

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

If you were trying to prove yourself wrong, you did a good job.

Take a look at freebore dia and length...

[Tim K]

Who are these people? Really, I'm interested.

C'mon man, give us your sources in the industry. Don't tease us with hints at your insider connections and then not come through! Name names, please.

[DangerLee_Industries]

please don't feed the troll...

Exactly..... Always a trend with folks that spew negativity around here. Seems like 1 positive post for every 50 negative.... All you have to do is click on " All posts by user" it's plain as day every time.

[spqrzilla]

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


try this on for size.

5.56 and 223 are not loaded to different specs. the pressure is measure in different ways in different places, but it ends up the same.

A false statement really, based on your partial understanding of what's going on. Why is it that you are trolling this forum? The reason its obvious that you are a troll and have no valid purpose? The link you provide is to chambering reamer dimensions, not to ammunition specifications at all. And indeed, the chambering reamer dimensions as published by private companies not SAAMI nor NATO specs.

[C Ward]

Not gonna mater what you say or what references you quote . The OP is the guy that wanted to build an AR10 in 6.5/284 and couldn't comprehend how the powders associated with that cartridge would affect the port pressures and timing with the gas system even though this is a well documented issue with gas guns going all the way back to the Garand . Physics must be suspended in Carbondale .

[Madusa]

I had a Savage 110E chambered in .223 that I shot both threw. The 5.56 would blow holes in the primers. Only shot manufactured ammo in it.