I don't have a chronograph, wish I did. But I have a G39 I have been playing with. I normally use titegroup for all handgun, 4.2-4.5gr with a 200gr plated round nose works well. If I get below 4.0gr the G39 won't cycle.
I picked up some Alliant promo because it was available and most aren't here last week. Using the same bullet 4.2-4.5gr also worked well. Both shoot very soft but haven't chronographed them yet.