Well, I have used Lyman, C&H, RCBS, Redding, Lee,Forster, and even a couple of old sets of Herters dies, and they all worked! The Redding and Forster dies seem to exhibit the finest workmanship, but I cannot say that any of the brenad I've used actually made better ammo tyhan the Lee dies. They didn't! In fact, even the Herters sets made accurate ammo, as did the Lyman 310 dies made for the old nutcracker handles.....