I'm in the same boat with my 35 whelen... I shoot the speer 220fp in my Ruger and it looks like they discontinued the bullet. I'm looking at the hornady and speer 250 grain offerings but haven't actually purchased any.
I tried some 220 gr hammer hunters a couple days ago and got about an 1 1/2" group at 200 with RL15. I'm going to try Varget to see if I can get more speed. That node was at 2640 fps. 22" barrel. I was close to 2800 with the TTSXs.
I've got plenty of Accubonds if you want to try them. My Whelen does not like them at all.