Just picked up one of these, took it straight to the range, normally I would strip and clean off the factory lube first and lube it up with something better, but decided I wanted to see how reliable it was out of the box.
Put 50rds of mini mags through first as fast as I could pull the trigger and no sweat at all, next went with 100rds of CCI sub sonics trying to see if it would cycle, and no problem at all, they have more oomph to them then remington subs, but less then the mini mags and it shot them no problem at all, finished with another 150 of mini mags and 100% trouble free.
Going to grab a bigger assortment of ammo next time out, only had a hour today and mainly wanted to just break it in a bit, so far everything is good as long as it holds up, time will tell.