I didn't know what WFT was either. Where did you get the dies? I had a .223 LEE full length sizing die and it just barely, I mean right on the line size within specs which wasn't good enough for my Colt AR. They would cycle out of the AR but if I had to manually eject it, I sometimes had to get mean with it. Come to find out it(the dies) was a counterfeit from China. I got it off ebay. It was a darn good counterfeit though. Cases sized in it would actually work in my bolt but not in the AR. The other dies in the kit work like a champ. Either way ill never buy something like that off ebay again.
That was just my experience. Make sure you measure all aspects of the case and see if its sizing within specs?