I primarily run Clay Dot and 147gr pills. But for 124gr, Clay Dot isn't ideal, so I went with Prima V/SV. I found both to be exceptional powders. They measure great and burn clean. I like both better than n320 just for the simple fact that they didn't leave the mess on the press that n320 did, ymmv. Prima SV is similar to Clays (Aussie) as V is similar to TG.
I currently have 4# of each. After I finish burning through the 16# of Clay Dot, I'll be switching to Prima V for 124gr and SV for 147gr.
If you search this sub forum a bit, you'll come across a few threads with load data and other's experiences with these powders.