First of all, subscribing.
I am a fairly new 10mm reloader. My loads so far have been lead 180 gr with Unique, HS6, 231, Bullseye and one other...I forget, and it apparently was not worthy of note.
I will continue to experiment with Unique and HS6...the rest, probably not, unless I have no other powder options.
I recently (actually, back in October) acquired a pound of Power Pistol and a pound of 800X. Both seem to have a bit of promise in 10mm.
While I like the 10mm, it is more of a curiosity than a conviction (like .45acp). I load and shoot and carry .45acp.
10mm...once in a while. Using a DW CBOB which was a nightmare to get working right...that may be part of it. It is a neat caliber, and a neat gun. lots more work than I figured on, and "almost" more than it is worth.