1) I use Shooters Choice high temp grease.
2) 2 777 pellets and a 245 aerotip powerbelt, will work well as long as they shoot good in your gun.
3) I have found the power belts are the easiest to load.
4) spit patch between shots at the range. I can load several time with out a spit patch during a hunting situation.
5) I remove the breech plug and soak it in solvent and run a patch with bore solvent or windex with vinegar the white stuff down the barrel, I then scrub the barrel with a brush. I them use a dry patch to dry the barrel and keep doing that until I get the patches to come out clean. Then I run a patch with break free down the barrel.
Hope this helps.