sean70 hit the nail on the head,
Quote:
The gun shop guy was probably just being super careful
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They just lay out a blanket statement instead of watching which guns are ok to dry fire and which are not(rim fire). With the centerfire pistol action, it is a mechanical action so there is a chance of failure,
Sort of like a car dealer would prefer you didn't stand in the lot & open and close a door over & over & over & over etc.
There may be a bit of safety involved also, nothing goes band if the trigger doesn't get pulled.
But nothing to worry about with the Sigma.
Some say dry firing smoothes the trigger.
I say it builds up your Sigma trigger finger muscle!!