I just had some Hoppes gun grease & used it. A very light coat of grease or oil on the Mag tube keeps the friction ring from seizing up or galling and causing cycling problems.
That's been my experience at least.
Also, you probably need to put a light coat of oil (or grease) on the magazine tube after cleaning. It makes the gun run smoother and the friction ring will still do it's job. My pre-model 11 shoots pretty much anything now even when set up for heavy loads, and it saves wear & tear on the gun...
What is the barrel length on this one-and I believe it says "mod" on the barrel for modified choke? You have some nice old shotguns, by the way :thumb: