I did not read the prior twelve pages, but I didn't see it in a search of this thread -- check out this site,
10mm-Reloaded -- one of the best load data sites for 10mm. I shoot 200gr, 180gr and 165gr moly coated hard cast in my SR1911 and G20. My goto powders are AA #9, Longshot and HS-6. I have also used a lot of Unique. Load choices have changed somewhat since I started loading the 10 as powder availability has been spotty. I'm almost out of #9, so my favorite loads for the 200gr will change. I'll probably try 2400, but hate the smell of it when shooting.
The SR1911 handles the hotter loads very well, the G20 needs a beefier spring to carry those same.