Best I have found is RCBS cast bullet, 5 gr HS6. I don't size the cases at all, just recap, dump in powder, and thumb seat the bullet. I use Lee liquid Alox as a lube, and they stick in the case fine. Also, I find a filler of florist's foam is very helpful to avoid the occasional pop. Unique also works, blue dot doesn't like to lite up, any of the pistol/shotgun powders are worth a try. I think the foam will help a lot with most powders.
Enjoy! Doug