Bronko's procedure has the additional bonus of being fun to do. Especially with a closed action rifle as it dampens the 209 noise to almost nothing.

Of course store your rifle with a good oil/protectorant in the bore and on all metals (the only thing I don't lube is the breech plug internals) but before loading, patch with a couple of patches dampened with alcohol - then a couple of dry patchs. I then use high pressure air to blow through both the bore and the plug to make sure no liquid remains. I've lately been skipping the cap/primer firings and just loading on a clean, dry bore. Works for me.