I have been getting spectacular results with Ramshot TAC. No chrony speeds, sorry.
This was a group with the 40 Vmax out of my Savage Predator Hunter. It goes way, way low. The largest group from the starting load to the max load was in the .3's.

I have shot similar groups with the 35 Berger with TAC.
This powder trickles like water, is clean burning, and fouls at a very minimum. I've been meaning to post this for sometime but never have.
I've got 16 pounds of TAC on the way and will use it extensively as I've seen enough.
Never see much about TAC on here so I figured I'd share...
Ya'll have a good one...
-Greg