But does E/M CCW still cause two wounds against Total Immunity? I think not but I remember it used to do so in N3 and now I’m in doubt
It doesn't have Non-lethal trait, but Immunity(Total) still makes E/M into Normal ammunition, so that it would be N+N ammunition I would like to treat that as a Normal ammunition, but I can't be sure.
But E/M does have the non-lethal trait. From T1: "The Trooper is completely immune to Weapons or Ammunitions with the Non-Lethal Trait, not suffering their effects, and not requiring a Saving Roll or Guts Roll." So I read that as an EM CCW doing Normal + [not suffered] = 1 Normal hit.
I like this logic best. So it’s basically 1 save against BTS, ignoring isolation and any other ill effects