My bullet of choice for the .35 Whelen, at least for elk is the 225 gr. Barnes TSX over a charge of 60.4 gr. of RL-15. Do start a couple of grains lower as that is absolute max in my rifle. For deer at reasonable ranges I see no reason why a 200 gr. bullet would not be sufficient. About all I can say is the Whelen has some serious smack down on elk.
If your #1 will shoot the 200 gr. bullets well, then loading them to something in the .358 Win. velocity range should do you just fine with reduced recoil. probably factory 200 gr. loads might be a bit strenuous for deer at the distances you will be shooting.
I think any of the 225 gr. bullets might be a great compromise loading for the Whelen unless you're looking at one of the great bears. In that case I'd look as a tough 250 gr. bullet like the Partition or Federal's load with the 225 gr. trophy bonded bear claw bullets.
I did find 4 boxes of the early two core version of Speer's Grand Slam bullets for my Whelen but haven't loaded any up yet. After the results I got on my elk hunt last year with the 225 gr. TSX, I wonder if the heavier bullets are really necessary? The one thing I can state without reservation is, I truly love my .35 Whelen.
Paul B.