I have read that the 1911 had the chamber cut with generous clearance and less taper than the K 31 to ensure reliable feeding under potentially adverse conditions. Seems logical to me that a case fired in a 1911 will expand in every direction from the base forward.
So if it is the case (I have not definitively proved that with Cerrosafe castings) that RCBS gave their sizing die more clearance in deference to the 1911s, it's not going to be just a issue of shoulder setback.
My advice is, if you only are shooting a K 31, buy the Redding dies.
So if it is the case (I have not definitively proved that with Cerrosafe castings) that RCBS gave their sizing die more clearance in deference to the 1911s, it's not going to be just a issue of shoulder setback.
My advice is, if you only are shooting a K 31, buy the Redding dies.