Here an update:
I replaced the factory sights on my S&W M&P 9mm Pro (5" barrel) with adjustable Novak fiber optic sights.
Adjusting them for a similar sighting than with my H&K P30 40S&W (it has factory sights, target sighting) did SOLVE the problem.
The gun is incredibly accurate, shoots now almost everything in the bullseye at 25ft, and in a 4in diameter circle at 50ft. Took it for competition (instead of my H&K). Excellent gun.
I replaced the factory sights on my S&W M&P 9mm Pro (5" barrel) with adjustable Novak fiber optic sights.
Adjusting them for a similar sighting than with my H&K P30 40S&W (it has factory sights, target sighting) did SOLVE the problem.
The gun is incredibly accurate, shoots now almost everything in the bullseye at 25ft, and in a 4in diameter circle at 50ft. Took it for competition (instead of my H&K). Excellent gun.