I have one PST, and thus far it has been pretty darned good. The best thing about it is it's light weight. I really like the PST Mrad reticle. But it has a 5 Mils per rev turret as opposed to 10 Mils on the SS, and it looses clarity at 24X o I turn it down to 22X or 20X.
But in the toughness category the SS is the clear winner over the Viper PST in my opinion.
800 Yard Steel Range
Precision Rifle InstructionMemberships and Classes Available