Bought one of these to size the bullets I cast, but shell holders would not go on the ram. First RCBS sent a new shell holder thinking that was the problem, but it wasn't so they sent a new ram. Shell holders can be put in this one, but now I need to know how to replace the ram. I thought maybe just punching out the pin would do it, but it doesn't seem to work. Don't want to hammer it too hard for fear of damaging the press. So does anyone know how to do this?