Let me play the devil's advocate for a bit. Why wouldn't plastic build up in the chambers themselves be just as much with long shells in short chambers as with long shells in long chambers? I know you're targeting forcing cones, but humor me a moment.
The only plastic buildup problem I've ever had in Argentina, when shooting over thousand shells a day, is plastic buildup in the chamber walls themselves which leads to weak, and then no, ejection of empties. Obviously, this is not from any sort of deposition of plastic caused by the passage of a plastic anything. The shell is stationary in the chamber, until it is ejected upon the gun opening. No hot gases trying to melt the outside of the hull, no friction from plastic against steel. Just a stationary plastic hull in a chamber. But, the chambers will build up enough plastic inside them that the empties won't eject, until you run a stiff chamber brush in and out enough times to remove it .......... for awhile.
My proposal concerning this is that you just don't shoot enough shells in the old guns to have a plastic deposition problem. They get cleaned before enough shells have gone through them to allow a buildup in the forcing cones. I never have this problem in any guns I have, other than those I have taken to Argentina for high volume shooting.
Just food for thought, not trying to start a debate.
Last edited by Stanton Hillis; 05/04/21 08:51 PM.
