I was watching an guy nail down plywood underlayment with ring shanks. He was working from what looked like large old cake pan of mixed nails from which he would grab a handful, and then sort through them and throw the culls back into the tray. When I asked him why he didn’t set them aside, he replied that the whole pan was mixed so it made no difference.
Given that he needed 1280 nails for the eight sheets, and that he picked up an average of 60 nails in a handful, how many extra handfuls did he need to pick through by putting the culls back?
Let’s say the tray had 15% non-ring shank nails at the start, and it held 2000 nails.