I shot my Blackout Ruger for the first time yesterday and have to say I'm pleasantly surprised at how the little rifle worked. It initially didn't want to fully cycle some handloads of 10.8gr of 1680 with a 208gr AMAX but after a few rounds of supersonic the gun starting running the 1680 load just fine. I also had some factory Remington 220gr ammo that ran fine right off the bat but it wasn't as quiet as the 1680 load with a few rounds going supersonic. Next time out I'll play with my LT-30 load and see how it works.
I sighted the rifle in at 100 yards with supersonic ammo since this is normally what I shoot in the Blackout. I dialed the rifle in using a Sierra 125gr Pro Hunter and 18gr of 296. I also tried some factory Nosler 110gr ammo and some factory Remington/Barnes 120gr stuff. The handloads and the 110gr stuff shot pretty much to the same POI/POA but the 120gr stuff shot just a bit higher.
I chronographed my 1680 subsonic load at an average of about 1,050 out of the Ruger. The 296 125gr Pro Hunter load ran at about 2,200 while the 110gr and the 120gr ran at about 2,350 for both loads. If my chrono numbers are true and accurate I think we'd be hard pressed to find better "defensive" ammo than the 120gr stuff since it is churning out AK performance with improved accuracy at a really good price.
Here is a photo of one of my groups with the 296 load. This is with the iron sights and is pretty typical of what I saw from the new Ruger. I'm confident the gun will perform even better with a trigger job and the addition of an optic.