You want to make sure the thread is synthetic and not cotton or linen. Ask me how I know.Mink oil - hard on thread.
Ah, I never was a carbide sizer die.Seriously, it's all I use for case lube anymore, except I usually wipe pistol brass with a rag dampened with Ed's Red when running them through a carbide sizer.
Ruined my first set 0f quality pac Boots because of this... Took about ten years... But for a boot worn so infrequently it should have lasted my lifetime.Mink oil - hard on thread.