I've had no issues with S&B ammo. Years ago, it was the only 6.5x55mm I could find in the area, and it worked fine. I have a few boxes of .308 also, but haven't sent it downrange yet.
I have little doubt that it will perform as advertised
In the 80s we had problems with S&B .22s as the extractor would rip through the rim. All the centre fire ammo I have used over the years has been good.
I've used S&B in .32 ACP, 7.62 Tokarev, 9x19 Parabellum, .45 ACP, .38 Special, .357 Magnum, 9x18 Makarov, .223 Remington, 7.62x54r, .303 British and 30-06 with nary a problem.