Polishing the chamber will not degrade it in any way. If you are using a piston system then you shouldn't be using gas rings on the bolt any way. They serve no purpose. Most aftermarket piston kits tell you to remove them in the instructions.i think i'll avoid doing anything to the chamber that will degrade its ability to return to a gas operated rifle. the slip grease sounds like it's worth a try. i loaded up 50 of the 95 ttsx w/33.5 rl15. with their expansion velocity and the tests i've seen on this forum, i think they'll do just fine at the ranges i hunt if i'm anywhere in the neighborhood of 2700 mv.
has anyone looked at lantac's straight pull bcg? they've placed a spring over the bolt tail and removed the gas rings from the looks of it- "spring assisted bolt unlocking system.
www.lantac-usa.com/product-page/enhanced-bcg-straight-pull-223-5-56 is it possible i could do something similar w/ my carrier, remove the gas rings and add a spring? then throw a little slip grease on the bolt lugs. will removing the gas rings effect bolt alignment and accuracy? or is all the alignment taken care of by the critical dimensions forward of the cam pin hole?