S&B seems to be known for this.  They are tough to reload as the primers go in only with difficulty.  If you chamfer the case mouth lightly you will find they are harder than a whore's heart.  If you reload them, I would just do so once and leave them lie where they fall.  For sure, keep them in a separate lot from your other brass.  In all fairness though, all brass needs to be inspected thoroughly as part of the reloading process, as splits will occur with all brass.  Inspection is just part of reloading.  Hatcher's Notebook even gives the numbers on my many splits, and what type, will occur in military rifle brass.  It makes interesting reading.  For sure, S&B brass splits at a much higher rate than all others, save the Chinese stuff from 8-10 years ago, but that is just my observation, nothing scientific.