No, it feeds ball ammo great, just not JHP. At least mine dosen't.
Once, at a range in Austin, to end the day, I dumped 2 15's and a 35 rounder as fast as I could put everything on target. Partially to see how fast I could shoot reliably, and partially cause I had brought more ammo than I needed and wasn't about to haul ammo from Austin to Houston (apart from my carry ammo, obviously). Needless to say it took a bit and got a large round of applause, including from the range guys. Now I wish someone had a video camera for it.