I carry my lever action rifles at half cock and empty chamber. I have killed plenty of big game with these rifles and never felt I was unprepared that way. I never "didn't" get a shot because of an empty chamber either.
Half cock does allow a round to be in the chamber without the obvious hazard of cocked or the hammer down on the firing pin. Make no mistake about it, half cock is not a safety...
Are you saying for all LVR actions including Marlin with the 2 piece firing pin???