[Dillon Lubrication]

It has a cone on the spring loaded tip that you place in the grease hole on your press. Press several times until you see grease coming from the sides of the links.

By "grease hole", you mean those little tiny holes in the links?

RePete got it right, great picture, tx!

You are also correct, those little tiny holes in the links!

[Dillon Lubrication]

About 15 or so years ago, Mike Dillon told me I should drill and tap the linkage arms on my 550 for zerks.

Too bad they don't come that way from the factory.

I'll second, third and fourth that.

It just occurred to me, I used to have a small tube of white lithium grease with a fine tip plastic point. I wonder if something like that would work?

Go to your local lumber yard/home improvement store and get a chain saw chain bar tip grease tool. It has a cone on the spring loaded tip that you place in the grease hole on your press. Press several times until you see grease coming from the sides of the links. Wipe off the excess. Repeat in each grease hole. About 5 bucks and will last for years. Makes a big difference in press operation.

[dillon 550- .223 sizing question]

I use a separate toolhead set up with a sizing die only. I find that this speeds up the process since I only have to insert the brass, don't have to remove it (ejected into a catch bin as the plate is advanced). Works even better on a 650.