Mine Works
I own a Ruger 77 stainless/synthetic. I have only fired around 25 rounds through it, but it feeds ok.
I was surprised that it had no feeding issues because the bolt is incredibly clunky and use to bind when I first got it, and I dry fired it.
I made up three dummy 350 rounds and cycled them repeatedly through the action to break it in, before I ever fired it. I fully expected it to bind or otherwise fail to feed at the range. But it worked fine.
The recoil of my 350 is savage, however. Honest to God, it is utterly punishing, and I have thought about selling it. I hope you can handle it better than I can.