Misfire gr. Every 10 nails there were misfires, using it is like Russian roulette. I chalked it up to driving 2 inch nails into 3/4 thick hickory and then into the Advantec sub floor. Now I'm trying to use and finish it on a finished white body. The same situation every 5 or 10 nails. I don't have a misfire but a huge almost double hole where the nail was driven. I've had it for six weeks now and it's impossible to get it back. Contacted Bostitch about a possible replacement.