I don't see how removing a coating that's supposed to prevent the CASES FROM RUSTING would be "hard on the rifle." That is the ONLY real purpose to lacquer/polymer/whatever coating on steel cartridge cases. Ever see "Silver Bear" cases? They're zinc coated. "Golden Bear?" Brass coated. All to protect the soft steel of the case from rust.
And Zuhkov's right about the "lacquer" on these cases not being actual lacquer. Though there ARE different kinds of lacquer; ammunition lacquer, such as what's used to seal U.S. primers, is specifically a nitrocellulose-based product. "Traditional" lacquer is related to shellac, which is based on secretions of the lac insect, (Laccifer lacca or Coccus lacca), in an alcohol-based solvent. Note that lacquers and shellac are both NATURAL polymers (shellac is actually a thermoplastic, since it can be molded under heat and pressure).