This looks like a good load for deer. The ballistic coefficient is about .40 which is better than my favorite load the SSA 110gr Sierra Pro. The only thing is that according to Hornady's charts (shown below) the drop in the 120gr SST and their 110gr VMAX @ 200 yards is the same.
Notice @ 500 yards (further than I would be hunting deer) the retained velocity is almost the same with the additional energy of a heavier bullet. Drop @ 500 yards is only a little over an 1" more. That's the BC.

(Click on pic to enlarge)

I wonder how far off a 110gr caliberated BDC will be with it.
Definitely have to get my hands on some of the 120gr and try it out.