If you're interested...

[The Shooters Apprentice]

A short article I posted up tonight with some thoughts I had while working up loads for 10mm.

www.patreon.com/posts/more-power-119133928?utm_medium=clipboard_copy&utm_source=copyLink&utm_campaign=postshare_creator&utm_content=join_link

I like it. I have some universal clays I used in the 45acp and found it cleaner as I approached the upper pressure limits in that cartridge. I'm guessing you're already hitting those pressures  in your 10mm that I maxed out on in the 45acp with your loads.

the hotter 7.gr load left the empty cases looking almost unfired it was so clean. The 6.5gr load I backed down to is still exceptionally clean. I like universal a lot. It’s what used when I used to shoot USPSA.