I just acquired an Ideal #45 lubricator, similar to the 450 and the Lyman 4500. I need to know how to load it. I can't find directions online. This is about 50 years old, worked good for the first 200 bullets but now I need to put another tube of lube in it even though it seems to have 2" of lube still in it. Do I need to take out the center rod and load it or how do I adjust the center rod?