Update on FF trigger pull weight
After adjusting my trigger bar loop to get my FF trigger to dry fire every time, with the green spring at just under 4 lbs., I finally took the unfired gun to the range.
My first three shots went off pretty well, however, out of the next five I had three light strikes. I took the gun home and closed the loop about .003" twice, and the trigger seemed to perform better in dry fire. Basically, this adjustment put in a little more pre-travel and allowed the trigger bar to move the striker block more out of the way so the striker would not drag on the block when the sear let loose a little later (timing).
However, now the trigger felt heavier. Measured it was almost 5# with the green spring. Actually shooting it may have forced some tension adjustments, or the parts just settled.
I replaced the green spring with the silver spring and now have a reliable (250 rounds with no failures) very good 4.2# trigger--just what I wanted.
I shot from a rest today with Lawman commercial brass FMJ 9mm 115 grn. at 7 yards. One hole about the size of a quarter for 10 shots. I shot a tighter group with my Barnes carry ammo, but only 6 rounds. The gun works and shoots fine. Thanks S&W and Apex. I know what the gun will do. Good confidence.
Now to train and elevate my skills closer to the capabilities of the gun. I'm looking at mounting a red dot and suppressor height sights.
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