The same box of nails that came with the nailer worked fine. I purchased a box of 2 inch, 15 ga Senco nails (as recommended by HomeDepot where I purchased the nailer) and the problems started. It shots blanks (which mar the wood) between 25 to 50% of the time. What can I do? The nails that came with the nailer didn't have a name on them, and the only thing that I can find are Senco.