I'm running Retumbo with a 215M primer in Lapua brass, 3.755" OAL at 0.020" jump.
2308 yards, 55 F, 27.55", 50% RH, 3090 fps. I'm at 39 degrees of latitude and the range has an azimuth of 280 degrees. The AB CDM gave 22.9 mils as the firing solution, 22.3 mils centered it up on the target. AB lists 0.420 for the averaged G7 value, the CDM solution trues to 0.414, real world gave 0.425, Hornady advertises them as 0.414. The vertical consistency was even more striking than the BC. 230 Hybrids are also the baseline I use and the only other bullet I've tested that runs with them for scoring is the 215 Hybrid. The ATips appear to be the next step forward.
The 1:8 gave a Sg of 1.96 at the day's conditions. The 1:9 Hornady recommends as the minimum twist would be 1.55. 1:10 gives 1.25. I've shot the 230 Hybrids deep into the transonic with a 1:10, but the ATips are significantly longer. The 230 Hybrids work well enough in that situation, but the 215's would probably have been a better choice. 1.780" long for the ATips vs. 1.681" with the 230 Hybrids.