18 Inch AR Barrel Questions

[markm]

I don't need it to be simple, but I would like to try to understand it. Are you saying that .223, .223 Wylde and 5.56 are merely different names for the same caliber?

Different chamber/leade cuts.

[pointblank4445]

Anybody know if there is anything special on the Mk12 5.56mm reamer/chamber/lead compared to a standard 5.56 NATO in say an M4/M16?

[Clint]

The 5.56 CLE Match has very short free bore and slightly steeper throat angle.

Anybody know if there is anything special on the Mk12 5.56mm reamer/chamber/lead compared to a standard 5.56 NATO in say an M4/M16?

[Don Quijote]

Your example of 1 is worthless. Why are you still posting on this site? You're an abrasive imbecile. I cited the reports from an instructor with the Sheriff's Office as to the unsuitability of (at least some) Wylde Chambers with 5.56 ammo... which mirrored my experience as well.

There are thousands of 223 Wylde barrels being fed everything from NATO milsurp junk to borderline nuclear loads with 80 - 85 grain bullets without a problem. But we should believe you and your cop buddy that they don't work.

OK

[pointblank4445]

The 5.56 CLE has very short free bore and slightly steeper throat angle.

Is the 5.56 CLE the same as "CLE match"?

[Clint]

Yes

http://www.compasslake.com/index.php...age=page&id=21

Is the 5.56 CLE the same as "CLE match"?

[pointblank4445]

And this is the chamber in the mk12?...that’s “optimal” for MK262?

[MistWolf]

There are thousands of 223 Wylde barrels being fed everything from NATO milsurp junk to borderline nuclear loads with 80 - 85 grain bullets without a problem. But we should believe you and your cop buddy that they don't work.

OK

Your opinion may differ from others, but there are ways to discuss them without being abrasive. I suggest you read what ArmyChief had to say on the subject-
https://www.m4carbine.net/showthread...4C-Style-Guide

[mark5pt56]

Alright, let's settle down on the topic. First had knowledge and from reputable sources are important. The chamber, pressure and cartridge differences are all known. You may also have reamer inconsistencies and cartridge dimensions that are manufacturing issues. One can potentially see how problems may occur and at the same time expose weaknesses in "theory" pertaining to "compromises"

In other words and my opinion, get a 5.56 chambered barrel. My 5R LMT MRP 5.56 has zero accuracy or functioning problems. I can speak of a named match barrel with a Wylde chamber that I loaded for and had to stay on the low end, it also showed problems with 262. It was accurate though but no more than my current LMT.

[Cokeman]

Wow. I asked for barrel suggestions, not for a couple of guys high jacking the thread to argue about what I didn’t ask about. Thanks