Not any help with that particular cartridge, although I had to work the same kind of issue years ago with my 7mm TCU in a 10" barreled Contender. Using a Sierra single shot pistol 130g bullet (no longer produced) I found a compressed load of H4895 that shot 1" groups at 100yds all day. I took it hunting in PA doe season to test it out. Had a doe walk under my tree and I was up 30 feet or so, my first shot brought almost no response from her. She moved a little and I took a second that put her down very quickly. When butchering I found both had broken a rib about 2" from the spine, one on each side. The first passed through without expanding and the 2nd expanded and wreaked total havoc in the boiler room. So, back to the bench to add more powder to a compressed load. When I reached a certain point of compression my groups went south badly, so I pulled the bullet out a little and added more powder until I was able to gain about 250-300 fps for that load. We won't discuss how much bullet was left in the case on my final load, lol. I still have some loaded today.