Shot it today. It despised the craptastic Winchester 555 bulk pack! Dirty, smoky, and stuck in the chambers.
Switched to CCI and all was sweetness and light. No misfires, smooth ejection, decent trigger. Using the XS dot past about 25 meters was challenging for me. With CCI SV, it hit right to the center of the dot at 25 meters. Kept most on a 5" plate. The nut behind the trigger was the biggest liability. Will try some other loads in the near future. Have some federal bulk, minimags, Aguila SV, AE suppressor, and some old school hyper velocity quik shock rounds too.
I think I'm really gonna like this little critter.