I think the brand is rheinisch-westfälische sprengstoff (RWS). Now owned by a Swiss company.
https://de.wikipedia.org/wiki/RWS_(Munition)
https://rws-munition.de/
I ran into someone who is telling me that most current US Military rifles are three round bursts and not full auto. Is that true? I thought we went away from the three round burst mode.
I ended up inheriting 2 boxes short of a brick of this German ammo, but it is 22 Long, not Long Rifle. Probably would not shoot in the 10/22, but perhaps in my bolt gun or 22 revolver?? What do you guys think?