I have both in F-Class configuration, and the Remington came first, but when I wanted to build a second, I went without hesitation to the Savage target action. Now I started from scratch, and wanted a build in 6mmBR. Yes, I could have bought a complete ready-to-go rifle for F-Open from Savage, but wanted a different stock and a particular brand of barrel to try, so I bought the action, barrel and stock separately. My personal reasons for the Savage were:
1. Solid bottom, single shot receiver.
2. Cost.
3. Ability to switch barrels myself,F-Class shooting is tough on barrels if you do it a lot).
4. Another benefit to the barrel arrangement is that I describe my new stick as the chassis, meaning I can swap calibers to experiment with at a much lower cost, and have the same stock and optics combination as I do so.
5. Even the factory Savages have been building a reputation for great accuracy among people more interested in performance than what their friends will say about the brand so mating that action to a custom barrel should be even better,it has been so, the thing shoots better than I hoped for even).
6. And lastly, I really *like* supporting a company that has been so supportive of competitive shooting sports lately,Savage Palma, F-TR, and both F-Open guns)
All things considered, were I in your place, looking for a 600 yd F-Class factory gun, and wanting one for the Open class, I would buy the Savage in 6BR. For one, I haven't researched all the factory twist rates for .243's, but would be surprised if they were in 1 in 8 for the heavy VLD bullets typically used for the longer range. Second, the 6mmBR is generally acknowledged to be one of, if not the primo round for 600yd match use. Third, the 6mmBR has quite superior barrel life compared to the .243 for match grade accuracy,remember, the X-ring at 600 is about 3' in diameter).
Eric