Are you 'riding the slide' forward? You should be pulling it all the way back, the letting it slam forward under it's own spring pressure. Give that a shot.
M&P 9FS, 10-8 rear, Hi-Vis front, Apex DCAEK & RAM
Stipling by A2
My M&P is beaten like a mule and loved like a princess.
(yup, it's dirty here, just ran 500 rds thru it in an all day shooting course. :D )