Selecting the right priming tool can sometimes be a daunting task. There are many choices and most of them do not work as well as they should. When ever you are priming always remember to keep the mouth of the cartridge case pointed away from you.
The reason the Lee Auto Prime is just about the best priming tool out there. What makes it good is the simple construction and great feel that it has. Do not let the low cost of this tool put you off either. This one is really worth getting.
Every priming tool should be lubricated. It improves the function and feel of the tool. You want as little resistance as posable. The newer Lee Priming tool has a significantly greater amount of tension on the spring. For this reason we recommend trimming the spring till you have only just enough tension to return the handle. You want as little resistance as posable here.
Finally the priming itself. As you push in a primer you will feel the leaver giving. With some brass the process of seating it is quite smooth till you feel it bottom out. On some cheaper brass though you may feel it slipping in as the handle gives in short little jumps, but in any case you will always feel it stop dead. You will feel the pad of your thumb begin to compress. That is the bottom of the primer. Tension on the primer anvil is good and getting ever one of them seating will go a long to in helping you reduce vertical in your groups.