So I went to use my HF pin nailer tonight and it sounded as if it was firing, but nothing was coming out. I check that I had pins loaded, did, so found an allen wrench and pulled the cover from the driver pin and found I had a jammed pin in it. Got the pin removed and did a few test fires and seemed to be working. A few pins later, jammed again. After some investigation I realized that the pins do have a chisel side to them, which I had inserted upside down. So just FYI for those of you that have the pin nailer, look closely at the pins when inserting them to make sure they are in the right way.
there are two ways to check for that darren, one put them in good light and you can see the wedge shape shine more than the tops or on most there is a black arrow printed on them telling you to put that end down.. ohh there is another way but not the best way.. put them in and run it till it jams up