I've been hand loading since the early 70's and the only significant difference I had previously experienced with primer brands were with shot shell primers. As far as metallic hand loading with non-magnum primers. I have yet to find one brand superior to another as far as accuracy or reliability. Of the thousands I've loaded over the years I have had very few duds. Possibly if I were still shooting through a crony I may have seen something significant. As far as group size on paper I have not seen a difference in any brand including Wolf.
I got an email spam with a bargain on S&B brand primers a couple of months ago. Being a tight wad and seeing a bargain I sprang for a thousand each of small and large pistol and another batch of small rifle.
Guess it is a lesson learned from the school of Hard Knox. The S&B primers have been frustrating to load. So far I haven't had any to the range so I can't speak on their reliability. I can't get the S&B's to operate without constant jams in my Lock'N'Load set-up. The slider constantly sticks. By alternating the S&B primers in the tube with every other primer either a Remmy or Winchester. The slider worked a bit more reliably but two consecutive S&B's the slider would not go home.
Adding to the frustration the S&B's seem to be inconsistent in size. One might need considerable force to properly seat and the next slides right in. I had three of the small pistol primers go into place so easy feeling no drag at all. I pulled the brass from the progression and stuck them aside. Tinkering the next day I de-primed the live S&B primers and replaced them with Winchester primers. The Winchester primers felt as though they seated normally with just the usual amount of drag I usually feel. The brass, multi fired 38 Spec, two pieces of Winnie and one Remington. I feel that the loose fit was a result of the primer and not the brass' primer pocket.
In summary I can say I got what I paid for but it will be the last batch of S&B primers I will buy regardless of the price. I'm stuck with them now as they can't be returned. Guess it will be back like the good ol'days with a single stage press. Loading the primers by hand sitting in front of the TV because they simply refuse to work in my Hornady's auto primer feed. I can almost hear my wife again saying "are you sure they wont explode".
I guess with the shortages beginning again I could easily sell them but I do like sleeping nights. Hopefully I just got a bad batch and every Tom, Dick and Harry that took advantage of the sale price doesn't have to deal with the same problems I have had so far.