Co-ax press and die fit
I've had a Co-ax press for over 20 years, and use all types of dies. They all work, it;s just that some "float" more than others. The design highpoint of the Co-ax press is that you get float to self align the die to the case. The press is slotted to slide the die in-and-out to and away from you, and the shellholder is sppring loaded right-and-left. Between the two floats your die and the case that you are processing align themselves without misalignment. In a Rockchucker type press the float is govened by the tolerances between the case manufaturing tolerances and those of the shellholder, and ram. In the Co-ax when you use a die whos lockring is thinner and or smaller in diameter than a Bonanza lock you just get easier an more "float" in the die instalation slot. Remember, when you run the ram to its top most position to size, seat, bell, or whatever, you automaticly take all of the "slop" out of the float. You do have to take a bit more time to line the case and die up with care when you preform your operation. The die lockring just moves to the top of the notch for it in the press. I'd rather have a Co-ax press than a turret press. The dies just slide in and out easily in the same slot all of the time. As an aside: Lee lock rings stink on any press, and I always throw them away and substitute Hornady or Bonanza rings. Hornady's New Dimension lockrings work great in the Co-ax press. I know that many consider them "cheap" dies, but I think they are great. Just use two openend wrenches to set the decaping stem and lock it. With other dies you pay extra to get a floatiing seater.RSY said:All round rings seem to work (Forster, Redding, old RCBS). I've heard of some also using the half-flat, half-round Hornady rings, as well.