Retumbo and H1000 are top choices. I ended up with Retumbo for 100gr Speers when I had mine. I think I started about 68gr with a Lee Factory crimp. I might start at 70gr without one. Velocity ended up in mid 3500s by the time I was done.
Hoddgdon hasn't published any Retumbo data, but they have pretty aggressive H1000 data on the website if I remember right.
