As for grease it does not take a whole lot and one pound would last a long time. For quite a while now I have used the grease which is for disc brakes on both bolt guns(back side of locking lugs) and my LRB M14SA. Ammunition is similar to gasoline in that if you have a finely built engine you would not use a low quality gasoline in it for best performance. Many do use military surplus ammunition but the reason it is surplus is that it has been declared non serviceable by some military body. If you do use it suggest staying with such ammunition used by NATO members, supposedly all very similar or same in quality. Good feature of the 308 round is that there are volumes of information, data, etc. on the round and reloading data for your rifle is plentiful. First "things" I would suggest purchasing is a new or near new GI extractor and Tubbs springs for both trigger group and operating rod spring, Sadlak round spring guide, and find those items make for a smoother operation of the rifle and the Tubbs springs in the trigger group does make for an improved trigger pull. Trigger pull on these type rifles should be at or slightly above the 4.5lb pull range. Suppliers of parts on this site are a good place to look for whatever for your rifle, you will see them mentioned frequently. You have arrived at the right place for any and all details on your rifle and wish you the best with it.