After cleaning the bolt and receiver lugs I use a fine synthetic grease, just a pinhead or so, on them and the cocking cam ramp.
Hold the trigger back and work the grease over the lug faces by cocking and un-cocking the bolt a few times.
My Kelbly actions come supplied with a syringe applicator full.
Permatex High Performance Synthetic Grease available at Can Tire is also a very good product for this application.
https://www.canadiantire.ca/en/pdp/p...p.html?loc=plp
Enough to last 10 life times.