What are the best brands of ammo for .40 S&W?

Instead of PSC, do you perhaps mean PMC? If so, you have good ammo. Stay as far away from Igman ammo as you can, it sucks, and sucks hard. Sellier & Bellot is hot ammo, sort of plus P, but not listed as such. Winchester white box is good for range and plinking. Remington Green box and their UMC is good ammo too. The UMC does seem to be abit inconsistent in powder charges though.