I bought a set of RCBS dies at a gunshow this weekend. They are marked "22 Wildcat". I did a cast of the FL die and the base of the die measures .408", the shoulder diameter is .349" and length from shoulder to base (where die ends, not including what would be outside the die during sizing) measures 1.590". Any ideas what this might be? Only thing I can figure for a parent case is 30/30 but it is slightly oversized at the base. Any help would be appreciated.

Tim