For all the years I shot PPC competitively, I used standard dies and the standard Bullseye charge. I bought HBWCs for matches and shot solid based wadcutters froma pair of molds, for practice. After two seasons my practice scores equalled my match scores so I stopped using the HBWC and bought a pair of six cavity molds for the 148 WC bullet. Still used 2.8 grains of Bullseye and won my share of matches. I have since stopped competition but have a press set up specifically for 2.8 and the 148 solid WC. If you cast and size your own bullets, use as little lube on the bullets as you need. I found they only needed the first lube groove filled.
Also, if you cast your bullets a bit harder and load them to 900 fps, they make great small game loads.
918v, I never knew there were WC cases developed. Who makes them? It would seem if the lead were soft enough to deform, it would obturate to the bore after getting swatted by the powder charge.