This is off topic to the issues relating to the Ross rifle. A quick search answered my own question concerning waxed cartridges:
http://https://www.thefirearmblog.co...ation-process/
http://https://patents.google.com/patent/US2972947A/en
http://https://www.youtube.com/watch?v=KSnwsSlu7Sk
Finally located the reference to lubricating pads in magazines: the Thompson Automatic Rifle, not the 1918 BAR:
https://patents.google.com/patent/US1322271
RIA: Thompson Model 1923 Autorifle Forgotten Weapons
response No. 7:
http://https://www.thehighroad.org/i...uality.750367/Information
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