I have both a hammer type and a collet type. I had a bunch of .38 specials that were given to me by my brother, who bought them from a friend at work. They came along with some dies. I'd had one squib before in some Wolf 9mm, so I decided to pull them down and re-use. I kept all but the powder because I didn't know what brand or type it was. I used the collet type since there were a lot of them, when I have only a few I use the hammer. That's pistol, if I have rifle rounds to pull down I use the collet type.