When i picked up my Sport 2, the only ammo available (while keeping my arms and legs lol) was some Tulammo Steel case. I only ran it one time so far but it functioned fine. And considering my first time shooting an AR (and using stock sights) I was happy with it’s “grouping”.
I still have some boxes and will use them up when able. I would prefer to only run brass and that is my intention moving forward, but in these crazy times I will also make some allowances so I can hit the range.