Originally Posted by
PX4 Storm Tracker
I started this thread when my first D spring in my range PX4 .45 G began to give light strikes and needed to be replaced @18,753 rounds. Since then, I have put 19,700 rounds on the replacement D spring with no light strikes, nor problems. I will hit 20,000 on it in a few days and have no plan to replace it.
Not all springs are identical. It is possible that the D spring first used was slightly weaker. So far, all D springs being used in the 7 PX4s we have are going strong and doing well.
Trigger pull on my range .45 is 6.25 lbs DA & 3.5 lbs SA