Well, seems I am on the way toward doing some reloading for the 10mm. I've noted that 800x has been discussed positively but that it "meters" poorly and that at least some people don't use it for that reason.
That said, I've never really used/trusted automatic powder dispensers and typically, once I find my most-favorite load, I make a "dipper" of exactly the right size--then scoop up the right amount and go on my merry way. This worked very well with H110 and 185gr XTP's in my 44mag. Is there a reason it wouldn't work well with 800x in the 10mm?
And no, I don't typically load a thousand rounds at a setting--I have a manual turret press, not a progressive and I enjoy my time loading--a bit of extra time spent is time well spent, not wasted.