I had one in 300 win mag that I made more accurate by selling it and buying something accurate
My issue is just time and effort: I have very little spare time to screw around with something that needs special treatment and my particular
Ruger rifle did. I'd shoot two rounds pretty accurately then the third shot was WAY off. I still wonder if it was me and the other folks shooting the rifle (all same results) or the rifle itself.
I talked to lots of people who have them that love them and others that will never buy one again. Lots of people in Alaska swear by them. Prior replies show that there are things you can do to make them accurate and that some are already tack drivers.
If/when I get time I'd really like to have a tack driver Ruger, I really like their actions, the company and the tough simplicity of the M77.
Best of luck on yours, hope it works out great.