I've got a spreadsheet with 131 three to five shot groups over a few different powders, primers, and bullets on a similar setup (1/8, 26"). PM me if you're interested, don't mind sharing.
Looks like for H1000 I was only shooting the 168 VLDs, charge of 66.1 to 68.1 with Peterson brass and BR2s (was out of mag primers but have them now... add a solid 40 fps plus but the BR2s are pretty accurate). Groups with this were 0.46 to 0.78". Tried it again with hotter charges, 68.9 to 69.7. No pressure but the groups went to hell (2"). But I want to get back to the lower charge sometime. Or push it over to the next node.
The 175 ABLR I was shooting H4831 (57.7 to 58.7, decent groups) and IMR4350 (55.8 to 56.8). Again decent groups but I tried again and the groups were more in the 1-2" range, nothing like the crazy ones I was getting from the VLDs.
Also found that the rifle sped up a good 90 fps or something after 70 shots or so. The BR2s were accurate but now I'm back into Fed 215s they're far more consistent. The PPU brass gets a little more speed and solid accuracy but not nearly the consistency with Peterson and mag primers over a stable powder (H1000 or Retumbo). That old school IMR4350 will surprise you though!
Good luck, I think 7RM is a fine round.