Warrigul wrote: Anyone getting a carbon ring in the throat of the chamber is doing something wrong when cleaning the barrel, after all the brushes and cleaning fluid clean the throat as well as the rifling(or should be anyway).
The "Carbon Ring" being mentioned has nothing to do with the "Throat" area.
Nobody mention the throat area, in fact I would believe it's nearly impossible to get a carbon ring in the throat area.
The Carbon Ring I mentioned as in the area that is in that area created by a "short neck cartridge case".... It's in the Neck area of the Chamber.
If you use a correct fitting Bore Guide then it would cover that area in the neck that has been exposed by a short case. All the best cleaning methods will not clean what is covered over by the Bore Guide. You need to specifically target that area and the longer it's left the more it builds up and the harder it is to remove until you get a case neck than then is forced into the carbon ring creating a virtual crimp around the bullet. Hence pressure build up.
Hope I explained my specific point to all that may be a little confused about trimming cases too short.