If you have a delrin bolt, no lube is ever needed for it. In fact, NEVER lube delrin bolts, because they swell up and become useless if you do. This happened to a friend of mine. Anyway, one thing you do occasionally want to lube with DC33 (Shocker grease) is the 3 way orings. Also, depending on what 3 way you use, occasionally you'll want to polish the inside of the 3 way body with Brasso or some other good polish to keep it sliding smooth. Also clean the ball detent to keep it from becoming either too soft or too stiff.