I did a quick search but did not find anything that resembled my issue.

I received a Harbor Freight 23 ga pin nailer as a gift a few months back but did not use it until now. I bought Grex brand pins in several sizes but the nailer does not shoot any of the sizes. The instructions seem simple enough, but it appears the pins are NOT getting down to the tip. The nailer does give the "pfft' sound so it appears to be getting air. The air pressure was within the nailer's recommended range. I just slid the pins into the slot in the magazine and closed the magazine. By the way, I did change the size indicator when trying the different sizes. It seems the pins just are not moving down to the tip. Is there some sort of spring device that I'm missing or perhaps just not loading it correctly? I'll admit that I did not give it any oil, but doesn't seem like that would keep it from shooting one or two pins.

Thanks in advance.

pin_nailer_instructions.jpg