Hi everyone,
I just got my R9S 2 days ago (serial R68x).
I took it to the range this morning to try out a couple of different loads and had the same problem with the 124 gr Golden Sabers. I only ran 20 rounds of the GS through it, but had 1 failure to fire with a very light primer strike. The dent in the primer was barely there. I chambered the round again and it fired without issue.
All the other ammo (WWB, Federal EFMJ, Gold Dots) had deep primer impacts.
I was very concerned at the time, but now that I read that it's one type of ammo, I feel much better. I guess I'll stick to the Gold Dots.