I don't load 10mm, but 7.6 grains of Unique sure seems like an awful lot for a 165 grain bullet. A quick glance at Sierra shows 7.1 grains max, and Lyman 49 shows 7.3 grains. No surprise it's snappy.
As much as I love Unique, it's a little fast burning once you get past normal service cartridges like 9mm, .45 auto, .40, et cetera. I would seriously consider a slower powder like Blue Dot, AA#9 or 800X for full power 10mm.