Bought quite a few boxes of the PPU 10MM at one time and am holding a once fired casing in my hand with a long crack in the brass as I type.

Saw several that cracked like this in the batch I got and would NOT recommend reloading this brass!!
This + they are the absolute slowest wimpiest 10mm loads I have ever run ( below normal .40 S&W velocities in fact!)and while they seemed consistent and fairly clean they shot to a different point of aim than a full power round like say Underwood.
See here as the PPU's were under 900FPS at 180 grain!
Contrast that with my normal defensive carry load here in the 180 grain Underwoods rolling in at over 1300 fps!