Although I no longer own it, my Ruger M77 Mk II was a controlled-feed action. The cartridge was under the control of the magazine or the bolt at all times. The cartridge lifted directly into the extractor as it exited the magazine, and it was impossible to get a second round out of the magazine before the previous cartridge was ejected. It was every bit as good a system as the original Mauser action from which it was adapted. I've never understood why the Ruger action isn't the basis for more custom rifles.