This year I'm using Zero 148 HBWC bullets and also switched over to WW231. I was using Precision Delta's HBWC's and Titegroup (2.7 grs.). I like the Zero's because they are so clean. PD's were a bit messy.
I have some factory Winchester 148 rounds that shoot really good out of my revolver. When I develope a new load, I shoot 6 factory win. rounds through my chrono. It can be a little different due to temperature and such, so I check it at the same time I'm working up the new load. My intention is to mimic the factory round that works so good in my gun. Anyway, the factory rounds shot that day at 745fps, so that was my goal. Here is the short answer to your question: Zero 148 HBWC over 3.1 grs. of 231, using Winchester brass and Federal primers. That gave me the 745fps I was looking for. I hope it works for me, because all my match ammo is now loaded for this season. That's what I do in the winter since I can't shoot much.