The Military classic ammo does not have a polymer coating, it actually has a lacquer coating. The "black box" Wolf with the polymer coating was created to help fix some of the problems associated with lacquer coatings. It you shoot Military classic fine then the other stuff should be fine to. Only one way to find out.
The mil clasic I have is poly coated gray case on the 5.56/223. The 7.62x39 mil clasic I have is the greenish steel cases. Also older production. I just do not know if I should buy @ 270/1000 ? for the 62g black box stuff.