Stanley Bostitch MIIIFN Flooring Nailers "wood dents" Questions

dents in the edges of the boards, even though we're trying not to use too much force when hitting the trigger. The manual says to remove the bumper spacer (p/n 118076), item 22 on the schematic. Could

...dents the wood almost 1/4 inch. Just replaced the seals (first attempt at that job). Nailer seems to be working otherwise, it just will not shoot the nails. Hi Jes, Are the nails moving freely in the ...