Nedfig - Those zippered, lined rifle cases eat more guns than the Australian government. So do the closed-cell foam hard cases. Both are notorious for collecting moisture. My friend ruined an old Savage 99 is a soft case. He stored it in his closet, bore filled with oil. Took it out after two years and the barrel surface and lever action had rusted.
If you can, store the rifle with the bolt out or action open, muzzle down, with rig grease in the bore and action - and no case. The circulating air is much less likely to result in condensation on the steel.
Good luck
Noban