Belated, but perhaps useful:
SAAMI is a shield for ammunition manufacturers. "I made it to SAAMI specs."
P O Ackley wondered in one of his books how the specs were set, since they are so internally inconsistent. I think the basic fact is that we are all the canaries in the coalmine. If users are not experiencing failures using SAAMI specs, then the load is probably alright. Note that for a few decades, it was believed that CUP measurements reflected actual PSI. But 50 KCUP is really about 62 KPSI, so most bolt thrust calculations done in that period were well off the mark.
