About 800-900 FPS will clear most rifle barrels. Lead can get down to the 500 FPS range.
I see no reason for reduced velocities for any reason
You are missing a lot, IMO and IME. I have found reduced loads handy for many purposes: hunting small game, practice loads (low velocity loads willl definately make you work on your follow thru!), plinking, teaching tools.
There are warning notations in every manual I have on reduced loads....
Of course there are. All manuals I have also have warnings on overloads. Does this mean I don't load maximum loads? Of course not. I think if you will check your load books, the warnings about reduced loads have to do with reducing slower burning powders below certain levels, which is a BIG no-no. Reduced loads with faster burning powders are perfectly safe, given appropriate bullets and charges.