Little-to-no experience with S&B brass of any flavor.
No need to go offshore to find brass that gives FITS about primer fit. There was a run of W-W 9mm brass that my shop used for about 5 years in the late 1990s, and that miserable %$^# stuff had the balkiest, nastiest, and tightest small pistol primer pockets I have ever encountered in my life. I tried swaging (RCBS)--reaming (counter-sink)--it REFUSED to seat a primer without ridiculously high seating pressure. After a year of off-and-on trying and failing, I just tossed the lot of it and got some R-P bulk brass and called it GOOD. I still have some of that hanging around, and it is slowly being replaced by Starline brass--which is drama-free.