I tried a set of Hornady dies in .30-06 many years ago when I first got into handloading. They have a "floating", non-threaded de-cap rod that gave me no end of grief. No matter how much I tried to tighten it down, or how much dry lube I used in the case neck, the expander ball would stick in the neck and pull the rod out on the down stroke. It was so long ago I can't even remember how it was supposed to tighten down. The design may have changed since then, but I don't know for I've never gone back to Hornady again.
RCBS and Redding dies, by contrast, have been entirely trouble free.
P.S. Just checked the Hornady and Midway websites, and it appears that the new Hornady dies have threaded de-cap rods now, so I guess I wasn't the only one with a problem. Try Ellwood Epps for your .308 dies.