How do you clean your barrel?
Cleaning Rod or Bore Snake?
How to Break-in a Barrel
OR NOT................
Do the old fashion hoppes #9 bore brush and patch. See if the patch comes out green.
if for some reason you swap barrels i would love to have this one to practice threading on
Looks like they put 5.45 bullets in a 5.56 case.I know it sounds impossable but stranger things happen.
Looks like they put 5.45 bullets in a 5.56 case.I know it sounds impossable but stranger things happen.
Before you make any major changes to your barrel or ammo, thoroughly clean your bolt and carrier. Make sure your seal rings are doing their job. Had this issue a few years ago in my open division rifle. Match before was a half inch gun. At the Tennessee State tactical 3gun match the next month, keyholing started to appear. the next match, a local three gun, the gun wouldn't even run. found the seal rings stuck in the groove and not sealing. Cleaned the bolt. The rifle went back to being a half inch gun.
i just have a hard time understanding how stickey gas rings could cause keyholing
Green would be copper fouling. I know CLP stands for clean lube protect. But it is not really a good copper solvent. (Jackets of bullets aren't really copper) but an amalgam. Generally referred to as copper.
This would be my guess, and the most probable. The size difference is minimal enough to get past machine operators, but enough to 'bounce' down the barrel.
Before you make any major changes to your barrel or ammo, thoroughly clean your bolt and carrier. Make sure your seal rings are doing their job. Had this issue a few years ago in my open division rifle. Match before was a half inch gun. At the Tennessee State tactical 3gun match the next month, keyholing started to appear. the next match, a local three gun, the gun wouldn't even run. found the seal rings stuck in the groove and not sealing. Cleaned the bolt. The rifle went back to being a half inch gun.
i just have a hard time understanding how stickey gas rings could cause keyholing
You are Correct Comrade, we had lots of surplus bullets lying around and we did not think you Imperialist Americans would even notice.Looks like they put 5.45 bullets in a 5.56 case.I know it sounds impossable but stranger things happen.
Me too. This whole thread has me scratching my head.
A 1X7 223 barrel stabilizes everything. I have never seen a dirty barrel cause keyholing. Never a dinged muzzle. Certainly never a magazine.
You could always measure your bullets to see if they are undersize, but I don't see how that could cause keyholing either.
Something is happening that is a mystery to me.
But as mentioned earlier, Im not sure why it would happen now and not on the 800 rounds before hand.
Because sometimes on a production line mistakes happen. A worker grabs a box of 5.45 (.221) bullets and they get loaded into .223 casings. Every box loaded until those used are used up are wrong, and they end up filling up a case that previously used correct .223 bullets. Snafus happen often enough. Every instance of key holing I've ever witnessed has been a case of bullets undersized for the barrel.