A 200gr at 2100 fps is a 35 Remington load, exactly. In my hunting experience, the 200gr Remington Core Lock round nose is one of the best performers for that load. The 200gr Hornady RN is pretty disappointing in comparison.
If you want to extend the range with that load, use the 200gr Hornady FTX; it works well too, just be aware there have been some reports of it blowing up on shoulder bones. I have not experienced that myself and IMO is probably more of an issue with pushing that bullet too fast and/or very close shots.
As to load data - I have not loaded my Whelen to 35 Rem loads because I have a 35 Rem (The Whelen gets either full power, or much lighter loads that are subsonic or 357 Mag rifle equivalent.). However, a mild dose of H4895 will do what you need. Start with min loads and work down to the velocity you want.
