What I am trying, after some internet help, is to put a kind to partial crimp on the case mouth using the shoulder slope of .222 dies. If one is merely plinking, all you have to do is put enough slope to allow the case to enter the chamber mouth. If you are a keen GAF competitor and want to speed it up, I think more crimp is required.
I believe Russian target loads have less crimp than service issue loads that had that funny looking bottle-neck.