Sestoppelman, what remedies did Ruger do for your rifle? PRVI was the only ammunition this occurred with, the spent primers on the brands of other cases appear normal. I took the firing pin assembly out of the bolt and it was loaded with black grease, so wiped the excess off, will look at this further for cleaning.The light strike thing bothers me. I had one of the earlier first runs of this rifle and it had the same issue. I suspect some good handloads would tighten up your groups though.
I agree with your comment on working up handloads. There's a good bit of info here on AH. Thanks for your comment.