Try taking a torch ot one of teh fired cases with the lacquer and see how hot it really has to get to melt.
The whole argument about sticky chambers from steel cased ammo came out after teh introduction of polymer coated cases. And most of teh complaints were from autoloaders where shooters would cycle a couple hundred rounds and leave one in the hot chamber and then have problems after it cooled.
Try cleaning your chamber as it was discussed earlier and as the video above states. I have shot lacquer coated cases from Russia, Serbia, Czechoslovakia, etc. with no sticky chamber problems. But I have cleaned my chambers well.
Carbon will build up in your chamber over time when using steel cased ammo and it can make things sticky too. If you polish your chamber a bit, then follow up cleanings of the chamber go pretty quick.