Actually, I THINK split-rings tilt the die more than set screw rings. When you tighten the screw to close-up the split, you are slightly changing where the threads on the ring hit the threads on the die in the circumferential direction. One edge of the split goes down a little and one edge goes up a little, which locks the die to the press using the downward moving side. With a set screw ring, you pull the ring to one side of the die, but you don't necessarily tilt it. And, the lead shot deforms into the threads completely. I find them easier to unscrew than the split rings after tightening, so I THINK they tilt less.
SL1
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