. . . Most don't own a grease gun, and some that do blow grease seals out the first time they use it . . .
That's because whoever fitted the Grease Nipples neglected drilling exit holes for the old Grease to come out.
I always do it, never had a Seal displaced.image hosting
The current Link I made to fit the BMW S1000R Shock to my Stelvio doesn't need them, I just use O-rings cut through.
The Grease just goes through the split between the ends.