Dillon 450 with 550 primer system

[KY DAN]

So I have issues from time to time with the primer bar sticking.

My 450 machine is second hand and has a very well used past.

Looking at the bar the primer pin and retaining cup sleeve sets above the bar and the bar does not make contact anywhere else.

I lubed the side and bottom of bar with 3 in 1 oil and loaded 500 45 acp issue free.

Is there a contamination possibility doing this?

I use brake cleaner to clean primer punch and retaining sleeve each time I load.

I know primer dust/ debris could be an issue if not cleaned from machine in a oil paste

 

[nettlle]

I don't do a major cleaning and lube of my 550 that often but do clean and lube the priming system frequently. It's that nastiest working environment of the press.

 

[Soonerpesek]

I lubed the side and bottom of bar with 3 in 1 oil and loaded 500 45 acp issue free.

Glad that worked for you…
I am the opposite, I clean the priming parts with alcohol and use NO lubricant.
I did purchase the extended primer track bearing from UniqueTek and that seems to really smooth things out…….IMO….

550 Primer Track Bearing - SKU: T1571

The UniqueTek 550 Primer Track Bearing has a 1.4″ extension that supports the primer bar better. This extended support prevents the primer bar from "drooping" and binding while its in the "out" position. Nicklon™ Nickel/Teflon Plating Our Primer Track Bearing features Nicklon™ … a co-deposition...

uniquetek.com

ETA…..
The slight amount of oil you used is not gonna contaminate anything……

ETA......
cleaned up some wording and added link.

 

[BreechFace]

Powdered graphite is another good option for dry lube.