I'm thinking either Suffix or Cortland. They show both those brands on their website. I think you're right about the old stuff being Mason. I never had any issues with the old Cabelas leadcore. It was quality stuff.
I asked that question based on our conversation the other day Tom. Maybe next time one of us Fishlakewinni guys (or gals) order some from Cabelas we can ask.
I have a feeling it might be Cortland as it is a little hard to strip back at times, something Cortland was famous for. But in either case, I have had no issues with it at all.