After a thorough bore cleaning, wipe down the action, trigger guard, scope, barrel and all exterior metalwork of a rifle with a light coat of gun oil. When I plan to store a rifle for 2 months or more, I run one last patch dabbed with a light coat of oil into the bore to prevent rust.
To further avoid rust, firearms should be stored in an environment that stays around 70 degrees F year-round with humidity of 50 to 55 percent. It is best to lock all your guns and ammunition in a gun safe. If you don’t have a safe, at the very least secure firearms and ammo in a closet or room that you lock tight. Be sure to affix trigger locks or cables to all guns for added security and peace of mind.
When you break out your rifle for a practice session before next hunting season, run a dry patch through the bore to remove trace oil.