I got a Lyman trigger pull weight gauge for Christmas and was playing with it on my lc9s Pro. I was getting a consistent 4 pound weight of pull but everywhere I look most people are in the 5 5lb. Is my gauge reading correctly or is it off? I was pulling on it a little hard at first because I wasn't sure if the arm was locking in correctly and I was just worried that I may have screwed up the gauge.