I thought of that but 5.56 is supposed to be hotter than 223. So I figured that wasn't the cause. However, thinking about it not all ammunition is the same. We do not know what he was using yet, that would be a big help.If it ejects the old case without picking up a new round, the bolt is not going far enough back. Gas issue, bolt carrier issue or recoil spring issue. Since it does work with plain jane .223, I would try other ammo first.
If you do research you'll find a lot of Wylde chambers do not like steel case ammunition. As will any firearm there are exceptions. You might have one.That's weird. I have a 12.5-in Rainier Arms SBR barrel with a Wylde chamber and it runs everything I put in it including steel case. Suppressed or unsuppressed
If it ejects the old case without picking up a new round, the bolt is not going far enough back. Gas issue, bolt carrier issue or recoil spring issue. Since it does work with plain jane .223, I would try other ammo first.
I thought of that but 5.56 is supposed to be hotter than 223. So I figured that wasn't the cause. However, thinking about it not all ammunition is the same. We do not know what he was using yet, that would be a big help.
Totally different operating system. Totally different issues with it. And there are issues.That's weird. I have a 12.5-in Rainier Arms SBR barrel with a Wylde chamber and it runs everything I put in it including steel case. Suppressed or unsuppressed
Thanks for the great explanation.Bingo. Gas port pressure, plus shorter-than-designed dwell time from the 18" tube. It's happened before.
5.56 usually is, but that doesn't tell the while story. The powder burn rate, and resultant pressure curve, determine where the barrel pressure is when the bullet heel passes the gas port and begins pressurizing the tube. Same reason some powders should NOT be used in an M1A, and similar...might be the same muzzle velocity, but it got there in a different way. The difference being a busted-a** op rod, cause your powder was too slow and had WAY too much port pressure left.
Anyway. I digress. It is possible that the 5.56 has a powder that is "right quick", and is dropping toward the lower end of acceptable port pressure...and it really needs either a larger port, or ideally, 2 more inches of barrel to gas for longer before the bullet uncorks at the muzzle.
The .223 might be a little slower powder, and is carrying more pressure, so gets away with the short gas timeline.
SOME 18" barrels, port diameters, and load combinations that don't work well with rifle gas would actually run more positively if they were a carbine gas system, or an intermediate between the two.
Totally different operating system. Totally different issues with it. And there are issues.
Best thing you can do is to not use that ammo, and thank your stars that you found that out when it didn't count.Hi all:
I have a 223 Wylde, 18" SS Barrel, PSA. It cycles any 223 ammo I run through it, but will not run 5.56 consistently. I might get 2 rounds through, the bolt closes on an empty chamber. Occasionally the trigger resets - but still have an empty chamber. Thoughts?