Two bullets I really like in my Whelen are the 200 gr Accubond and 200 gr TTSX, in your model 700 350 Rem Mag the 200 gr Accubond will be too long but you should be fine with the TTSX. Two others I would look at would be a 225 gr Partition which has also done well for bears here and I hear lots of great things about the 225 gr Woodleigh's both RN's and Protected Point's.
In my 700 350 Rem Mag the 200 ttsx is still too long. The ogive is inside the case mouth when seated to just barely fit inside the mag box. The 200gr tsx fits fine, as well as the 220gr Speer and 225gr partition. However I could only get the 200gr tsx shooting 2700fps. The 225gr partition shot the same speed, and was a bit more accurate for me, so that's where I settled.
