I've now put about 300 rounds through my Mini and I still can't zero the iron sights. They're all the way to the right and it still shoots several inches to the left. Today I did put a scope on the the Weigand rail I just got and I was able to get that zeroed in at 50 yards. It took a bit of cranking to the right before it hit center. Once I got there, the groups were pretty good with no signs of stringing or flyers. I'd say about 1.5" groups. I was shooting PMC Bronze and it shot well. You need to have iron sights that work though. I'm hoping Ruger can get it worked out and back to me in a reasonable amount of time.