Mine are .26/.26 @ op. temp. Sorry guys, but you know I am learning too, so here is what I do not get: If metal EXPANDS when hot, why is the lash LESS cold? If metal expands, should you allow for more LESS lash when cold? I don't get that!! Should the heat provide less tolerance in itself? For this confusion/reason, I never set mine cold. Until I understand this, I will not take a chance.