Prelim results with Varget...
Rifle is Savage 12 Palma action, 28" Krieger Heavy Palma 1-7 tw w/ Cortina tuner, McM XIT stock
Brass is once-fired Lapua .223, neck turned to 12.5 thou. Neck tension of 3 thou (.221 ID before seating), Federal 205M primers.
Ambient conditions were 38-42F each morning, between 80-95% humidity.
100yd seating depth test
Felt there was promise both at 11-14 thou, and the 23 thou group was nice but I didn't care for the groups on either side. So when I did the powder charge test, I seated everything long, and brought the arbor press and die to the range. Shot one group @ ~13 thou (based on previous experience with hybrids), and another @ 22 thou. 13 thou won.
Powder charge... obviously tight group @ 24.2, no discernable 'plateau' as far as velocities, OCW 'node' based on vert POI was around 24.6-ish, and calculated OCW/OBT node per QL would be around 24.5, based on ambient conditions. That may change considerably based on temperature. It appears the sweet spot for velocity (in this gun) is around 2800-2820, which jives pretty closely with QL.
Loaded up some more @ 13 thou jump, 24.5 gn Varget for tuner testing (fired round-robin, adjusting the tuner between each shot, then resetting to '0' and repeating the test). The group @ setting 14 was one hole... but the second shot wasn't a good break. Had one extra round, so at the end I re-set the tuner to '14' and tried sticking it in with the other two. No bueno. Fliers work both ways
Overall, I'd say it's looking promising for further testing. The velocity was a fuzz higher than I'd expected; may back it down to 24.4 gn. The bad news is that I'm about out of Varget... but it should be pretty easy to load to the 'target' velocity and work from there with another powder.