I wanted to share my experience with these primers so someone doesn't go out and buy 5,000 of them like I did. I got this idea to try and cut back on the lead in my house and thought I would go to a lead free primer. First off, if you don't seat them FIRMLY you get hang fires. This was in 55 degree weather. I went home decided to seat them a little harder and thought I had eliminated the problem. Shot a bunch more in 45-55 degree weather without any hang fires. Today with temps in the high 20's I decided to head to the range and they were hangfirin' like a mofo. Just my experience, because i haven't seen too many reports about them.