Although I haven’t hunted X9C in over 20 years… I can say that I have spent a great deal of time in the zone, backpacking and scouting for sheep. During these more recent trips, I have seen some bucks… Nothing particularly huge… just your average 2x2’s, 3x3’s and an occasional small 4 x 4. As others have said, the potential for a big buck is certainly there is this mountain range is big, wild, and absolutely gorgeous! Most of the hunting pressure is concentrated in the southern end of the Whites off the road to the Bristlecone Forests so you will have to get out and hike a ways if you expect to see deer. Big, quality optics are also a MUST!
Don’t overlook the Inyo mountains located further to the south, but still in the zone. Find the water (guzzlers) and you’ll find the deer.