[Ran out of TG, which powder to try next for 124/147gr minor?]

Try Clays.

Only 3.6gr of powder to make Minor Prod. Div.; soft recoil, clean-ish burning, cheap powder, minimal muzzle flash for low light applications...

It's 'poor man's N320' in my eyes.

I've used 3.5-3.6 gr of Clays with a 124 gr bullet in the past, which the load window according to Hogdon is 3.5-3.7. They do not publish data for 147gr bullet and Clays. I've read on various places online that trying Clays with 147 is getting into dangerous territory. I would not try this with 147 gr bullets.

[Ran out of TG, which powder to try next for 124/147gr minor?]

3.2gr for 147gr makes me a tad nervous as I can't even see a double charge with that little powder

I use the same for my loads, and I find that if you are paying attention to each powder level, a double charge is quite obvious. It also helps if you are loading on a progressive that makes it difficult, if not impossible, to double charge (650?). I used to load single stage and powder drop into 50 cases on a loading block, then take a flashlight and inspect them all.