Benchmark is good stuff. If there was a problem popping primers, I'd be willing to bet it was your basic overload.
actually it happened to me and I reported it...
it was right out of Hodgdon's manuals and reloader pamphlets, and they still publish it... and it was with a 95 gr V Max...
the loads were worked up in 1/2 grain increments...
I have only experienced it with THAT bullet, but I experienced it in 5 different rifles.....chambered in 260 Rem..
each time Benchmark pressure spiked...
I use it in plenty of other cartridges, but I don't use it with that 95 grain V Max.. which has never been real accurate in any of my rifles either, one in 8 or one in 9 twists...
I use it frequently with the 120 grain Ballistic Tip and never ever an issue, and these incidents were all using commercial brass.. not military....