I've always let the gun tell me what it likes, but I have never had a problem with fast being inaccurate. If 50fps or 150fps more opens a group another 1/4" so be it. I never saw the sense in shooting a 300 Mag at '06 velocity and why shoot an '06 at 300Savage velocity?Fairly new to the reloading but i seem to always want to start with the fastest load, where do yall start? Middle of the road? Low end and work up? Im sure the answer will be what ever works best in the gun lol, but where do you start?