If I have to prime a lot of cases I usually use the RCBS bench priming tool. It is a great tool. I keep it bolted to my bench and remove the long operating handle and store it during times I don't use it. It does not get in my way and has earned a permanent place on my bench. The only problem I can see with it is if your need to remove the primer tube before it is empty, how do you do it without making a mess with loose primers? I think surely someone has figured out how to "stop the primer flow" in these situations. I sure would like to hear about it if you have come up with a solution.