The Lee Pro 1000 uses a gravity/slide primer system that does not have a positive primer locating system. In this video I show how to make and install a tube primer feed system similar to what other manufacturers use. Files can be found at https://www.thingiverse.com/NotAnExpe... for 3D printing the parts to modify a Lee Pro 1000 press. Also someone also pointed out that all commercial manufactures of reloading systems now put a blast shield between the primer tube and the operator, so in case of an explosion the operator is protected. PLEASE BE CAREFUL AND USE AT YOUR OWN RISK. ADD A BLAST SHEILD BEFORE USE!