The Underwood 100gr Xtreme Defender at 1800+ would probably be my choice in factory ammo for "lower than typical weight" 10mm fodder... But, why?. We are usually talkin' minute of BEAR vs. minute of car door where 10mm is concerned.
In the OP's case I can understand the "why?". That's certainly enough rounds to determine where they are going to end up. (And take care of a plethora of "bad guys"!)
Cheers!
P.S. I load the Lehigh 140gr version in both 10mm & 40 S&W and it's a doozy!![]()