I have a similar setup in my office at home. My dryfire practice rarely involves pulling the trigger on my semi auto weapons, but I too have done this many, many times over the years and never had a problem. Never even had a firing pin deform, even on 1911s. I practice target/position transitions, reloads, stance changes while aiming, reloads while moving, that kind of thing. For me, once I know the characteristics of a trigger using either/both hands (pull length, perceived weight, reset distance) I get nothing extra out of pulling it in dryfire. Some of my friends think I'm dumb to not pull the trigger more in dryfire practice but my performance at matches says I'm fine. I bet I can make master in CO and production in USPSA in the next 12 months.
For my revolver that has a firing pin on the hammer I definitely use snap caps always.