The 85-grain BTips will "work" for smaller deer, but you'd be better advised to use the 100 or 115-grain BTip bullets. That, or go to a bullet with heavier construction. The 85s are varmint bullets with very light construction, and they can cause gastly surface wounds on larger game. Even the "hunting" BTips should not be used if the impact velocity is much over 2800 fps. That is one reason for going with the 115s, they have a lower velocity but shoot as flat and carry the needed bullet energy to long ranges. If I were you and wanted to use just one bullet for 'yotes and deer, it would be a 100-grain bullet.
I used 100-grain BTips in my .257 Weatherby for deer on one occasion, but the two deer showed more meat damage than I wanted to see, even at 250-300 yards. The 100-grain Partitions or X-bullets do not have that problem.