Trigger get harder to pull at range
I love my M&P 40 and for the last 5 years it has given me zero problems but the other day at the range I noticed the trigger pull getting harder to pull after 50-60 rds. I striped it and gave it a quick cleaning and re-oiled it and again after 50-60 rds the trigger started to get harder to pull again.
Has anyone come across this and if so what did you do to fix it?
I have already looked at the sear and the striker block to see if it had a burr on its wall and i cant find anything out of place or unusual in or on the weapon.
I really don't want to modify the trigger if I can help it as it is my EDC weapon any thoughts or insight would be of great help.
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