I have some first day results on 175 in 7mag with IMR 7977. Rifle is Stiller action, 26" 4 groove, 9 twist Kreiger #4 built by Clayton @ West Texas Ordnance. It is a tight neck and Norma brass was turned to .0135", once fired and annealed w/ Fed 215 primers. I used Hodgdon data for 175 gr. and worked up the food chain from 64.5 to 69.5 grs. of IMR 7977 in 1/2 gr. increments. All loads were .010" off the lands. I found accuracy nodes @ 66.0 to 67.5 and @ 69.0 to 69.5 grs. The lower node averaged a 4 SD & 7 ED @ an average velocity of 2799 fps. The higher node was coming around real well, when I reached my last load ( of 69.5 grs.). SD was 12.2 and ED of 21 @ 2905 fps. As far as groups go, I was getting two touching and one about 1" out in these nodes. I pulled a couple, but I think seating depth will be my next test. All were 5 shot groups @ 100, measured on LabRadar. I also have plenty of Retumbo and Reloader 26, so it was hard to choose, but I've been getting tiny EDs with the 162 Amax and IMR 7977. Hope this helps someone, as data is tough to find. As always, start low and work up SAFELY. I had a faint smear @ 69.5 on one case, but no hard bolt lift or primer cratering.