Still hard to find factory ammo

Seems like unless I’m ok with converted (used) brass (with 223 headstamps), or REALLY expensive match ammo, the 300 blackout ammo is still a tad hard to find. I was just about to buy a bunch of brass and load my own, but it seems like I might as well brake the gun in with some cheaper factory ammo. So I found this, to be in stock in just a few days…