urbanrifleman
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Redding part # 77907 bushing die with the 40 Degree shoulder. Then use the bushing you want for neck diameter. That is what I use to size cases, after firing.
For seating I use one of my 20 Tac seating dies, adjusted for the 20-223 Imp 40 degree.
I have that die in stock that I specifically keep for the 223 Ackley and 20 Sploder.