Mark, just curious, what's the issue with a bevel base H&G #68?
I have cast and shot boo-coo BB #68 and don't have any issues with them. I had been lubing and sizing in a Star and have now started powder coating.
FB bullets tend to be more accurate and cause less leading issues so I've read,I cast the 200 gr. SWC Lee version of the H & G #68 which is a BB design and TL it and have no issues as well. At 45 velocities I can't see leading being an issue anyways unless your bullet is undersized and you don't need that hard of a bullet either.