Hello, Bill - We are sorry to hear of the frustration you're having with this finish nailer! Listed below are a few possible causes and solutions for when the fasteners do not drive fully. We hope this helps! And if you try these solutions and are still experiencing the same issues, then please feel free to email us directly at Reviews@RYOBItools.com. We would be happy to find a resolution for you!
Possible Cause: Air pressure is too low.
Solution: Increase air pressure.
Possible Cause: Depth of drive isn't deep enough.
Solution: Adjust the depth of drive.
Possible Cause: Nail is too long for wood hardness.
Solution: Use nail length that is appropriate for wood.