I have the RCBS, Lee and Frankford Arsenal hand primers. I love RCBS products (99% of my loading bench is RCBS), but it's my least favorite hand primer. It's just not smooth to operate. I have used the Lee hand primer and love it. It's smooth and quick to change out shell plates or switch between small and large primers. I purchased the Frankford Arsenal hand primer about a year ago because I wanted something I could set a depth on. It is my go to hand primer now. Very smooth, well built and a ton of leverage. It does seem to me the Frankford works better for someone with large hands, but not required. If your 13 year old son is going to be using it I would suggest the Lee or take the chance on the Frankford and let him grow in to it.