Funny this should come up again. The Gunny and I had this conversation last night.
I have older RockChucker's and it requires a cheater bar (a piece of pipe placed over the existing handle), no undo stress what so ever on the press, doing 350gr H-Interlocks. Whereas, the Gunny's RockChucker is the newer Series-4 and only required a two handed hold on the press handle.
I'd say either will work just fine, but the edge goes to the Series-4, that is for swagging down .458's to .451 or .452's. I and Gunny use the Lee .451 Bullet Sizing Tool (
http://leeprecision.com/bullet-sizer-.451.html).
I use this size (.451") and get bullet spring-back to .4515", which is exactly the Barrel/Bullet Standard for our chosen poison.
For the record and for some of our newer guys the standard of .4515" IS the standard of the 45 ACP and is our standard too. Bullets ranging in sizes of .451" to .452" are normal for us and all run well, and are not normally of any concern. I even have shot and enjoyed .450" and .453" bullets, but that statement is a canard, all of our bullets normally range from .451" to .452" anything over that wont chamber into the weapon well and may need to be sized down, in order to pass the Thunk-Test. Hence .458" sized to .4515"+-.0005".
..t