Had great luck on antelope and a couple of deer with the 85 bthp. Nice accuracy as well. Since you have them, I would use them and not worry in the least.
^^^This^^^
I've killed a truck load of deer & twice as many hogs using the Sierra 85gr HP in both my 6mm & 243. And several Antelope. It's super accurate in all my guns & will get the job done. Usually DRT, but not many exits. I now prefer the 100gr Partition in my 6mm, since it's going faster than my .243. But I damn sure wouldn't be afraid to use the Sierra 85gr HP on any Whitetail sized game animal. JMHO