Anybody heard about this round? I've seen a few videos about it, but I haven't even see the ammo online. It seems like a way to run subsonic out of an AR-10 platform with a heavy bullet. Looks like a .338 Federal with lower case capacity, but there seems to be a lot of interest.

https://www.youtube.com/watch?v=HOZ-...&frags=pl%2Cwn