Another vote for Titegroup. For me it meters well and gives reasonable velocities for such small charges. I have used it with a 125 grain lead bullet as low as 600 FPS, but that is below the recommended minimum and is probably too slow for anything but soft lead.
Despite the claims about how insensitive it is to powder position, I find a shot with the powder up by the bullet, as it is when drawn from the holster, is a little over 100 FPS slower than the following shots with light bullet loads. That is only about average, some powders are better, some are worse.
Clays may also work well, but I have yet to use it in anything but lead bullet loads.