I used 8 grains of Trail Boss with a 255 gr lead bullet last time I loaded some up. The beautry of Trail Boss is you can use it with any bullet with pretty much any caliber, even rifle, even though you'll typically only see it listed for lead bullets. And you don't even have to measure, you can just fill up the case to where the bullet gets seated and that's your max load. Then you can reduce it 30% from there.
I've never tried it with jacketed bullets or rifle, but it would be fun to try.