I have built three 721's and they are every bit as good as the 700's. The only difference in the two are the safety, trigger, and the extractor is not as good as the 700. If you build one, I would replace the trigger, at least put in a 700 extractor or better yet, have a Sako installed, and make sure the smith blueprints the action. Some of the old 721's were a little more true than certain vintage 700's. Good luck with your build.......Rich