Nature of the beast,

Being that the steel case ammo is either poly or laqure covered to prevent the steel from rusting, and when being shot, small amounts of the coating will be scrapped off on loading to cause a poly or laqure powderized fouling that can build up in the chamber.


So, since the poly/laqure powderized fouling will not standard solvent dissolve, it has to be scrubbed out of the chamber during cleanings via a Chamber brush and CLP.

Next when running such ammo, although it will not standard dissolve out, by keeping the upper receiver bearing areas lubed on the wetter side with CLP, some of the CLP will lightly migrate to the case during loading, which is transferred in small amounts to the chamber walls, and help to flush some of the poly powderized fouling out so the chamber does not foul choke out so quickly to cause the stuck case problem.  Here, start with the rifle upper bearing areas lubed on the wetter CLP side, and about every 200 round, pull the charging handle back just enough to get the gas rings to move forward of the side of the carrier ports, then add a few drops/quick shot of CLP in to the carrier gas chamber area, which will migrate to relube the upper bearing surfaces once again during live fire.


As for is the above the cure all, not really, and at some point, the powderized poly fouling is going to build up in the chamber to cause a stuck case (forgetting to re-lube at some point will be the main problem).  So when the this happens do a mortaring clearing like you would normally to do clean the spent case, and even if worse case, the spent case stays in the chamber, you at least have the bolt locked back so you dive the spent case out of the chamber.  Hence before you can get the case out, you have to at least get the bolt unlocked first since no force down the barrel is going to case the bolt to cam unlock.    As for once you have the bolt unlock via pogo'g and locked back on the bolt catch, then it just a matter of putting a single piece cleaning rod down the chamber against the inside of the case webbing and then a good hand blow to the cleaning rod handle will drive the spent case out of the chamber.  From here, give the chamber a good scrubbing and cleaning with a chamber brush and CLP by hand to clean out the collected poly fouling, dry the chamber and bore with dry patches and your ready to put the rifle back in action.

FYI: CLP, single piece cleaning rod, and cleaning materials should be part of your range kit, and left in the rifle case for when such happens.

Poly, brass, or even zinc will get scrapped off on loading and unloadings (drug against the barrel ramps).

The brass tends to be larger flakes since it softer, the poly powderized, and the zinc ends up as "larger" smaller pieces isntead.


But the CLP reapply thing every few hundred rounds will introduce small amounts of fresh CLP to help keep such from building up quickly instead.