I have a P80 / G19 build that was having occasional feed / ejection issues. It had a pretty tight fit between the slide and frame so I spent a lot of time just racking it over and over. It's running better now, put about 150 rounds through it last weekend with no misfeeds. The ejection is consistent but still seems sort of weak. So figure I'll either keep shooting it and see if it loosens up a bit more or just swap out the recoil spring. May be cheaper to just get a new spring...
Maybe set up a phone to take a slow motion video while shooting and then play back the FTE to see if that offers up any clues.