Did the guns trigger pull increase during the time you were shooting?
Yes, I perceived an increase in trigger pull during the course of shooting. Upon returning home, using a digital Lyman gauge revealed an increase in the G2 from about 2 lbs 12 oz. to 3 lbs. 14 oz. I don't know what the pull on the Encore was initially, it just seemed to get heavier.
I guess I'll take the Lyman with me to the range and check the pull on spent cases since my understanding is that dry firing can damage the firing pin return springs.