I've run it in two rifles so far; very early testing. Both rifles are chambered specifically to run heavy for caliber bullets in F-T/R. I'm posting this as a reference point for anyone who comes across this. Generally speaking, I'm about 2-3gr over book max for any powder/bullet combo in these specific chambers.
.308 Win (.180fb/342nk)
Virgin Lapua Palma Brass
30" 5R Bartlein ~700 rounds on it.
View attachment 7242803
.223 Rem (Kiff ISSF .169fb / 242.7nk)
Hammered LC brass I had laying around
28" 5R Bartlein 0 rounds on it
View attachment 7242805
In the .308 it was very very close to what I would expect to get out of Varget at the same charge weights.
With the .223 I need to play with it more; I usually shoot Lapua brass out of that, but didn't have any prepped brass ready to go, and I'm confident the volume difference between Lapua and LC played a part in this. ~24gr of Varget and a 90gr VLD will usually be moving ~2770-2800; so it was odd to see the .308 be right at Varget velocities/charges, but the .223 be so far off.
Since doing this testing a week ago, I shot a club match over the weekend with one of my .308s to fireform some brass for a state tourney next month. My thrown together 175 SMK & SWP load (doing this to avoid shooting more expensive 200.20x bullets) shot me a clean on the first relay, so the stuff works. Matches 2/3 I just couldn't hang in the wind against the 200/210/215gr bullets, but that wasn't the powders fault.
Lastly, if you're using an Auto Trickler V2, this powder is HORRIBLE in the Lee hopper; it jams it up something fierce. It doesn't look like it would, but it does...doesn't matter how much you loosen up the measure. I actually bought the V3 auto trickler because of how bad it was.