Yes, I have done somethings trying to get my Model 7 to shoot. I have free floated the barrel.This made it worse. Then I put it in a wooden stock with a full bedding block built into the stock. This also did not help. I added tip pressure to the synthetic stock. It shoots best with the tip pressure. I have tried many different bullets and combinations to try to find something that it liked. The closest thing I have found is a load using Barnes TSX bullets and RL-19 powder. It will shot three shots into an inch with this load. My best other load is 129 Hornady bullets and H4350 powder. It will sometimes shoot this load into one inch.
I have not tried the cyro treatment. May be this is something I should try before putting another barrel on the gun, because it is so easy to carry and I know that the 260 Rem will take deer at some distance. I have so many other guns that my 260 sits in my gun safe most of the time. I was mule deer hunting
in Wyoming last year and while hiking above 9,000 ft I kept thinking how much I would have liked to have my Model 7 with me instead of the heavier rifle that I was carrying. I didn't because I did not trust it enough to take a long shot.