Well...the 40s&w is kina close to the 10. I use Unique (I've a lot of it, no reason to switch), though other popular ones that'd come up might include 231, WSF and Bullseye, amongst several others. I just load plinking ammo in the 40, which is either plated or lead in the 135-180gr range. Not a lotta difference across the board for what I want out of it.