Shotgun maintenance: end-of-season cleaning and storage guide

End-of-season maintenance decides how your first shot of next season goes. Powder residue in the barrel and moisture in the cabinet are the two most common causes of rust. The routine below is written for gas-operated, magazine-fed shotguns.

1. Safety first

1. Remove the magazine.
2. Pull the action back and open the chamber.
3. Confirm the chamber is empty by sight and by touch.
4. Keep the muzzle pointed in a safe direction throughout.

Work in a well-lit, well-ventilated area away from children.

2. Disassembly

Follow the sequence in the owner's manual. Stripping further than required can disturb factory tolerances and may affect your warranty. For routine cleaning, separating the barrel group, the bolt and the gas piston is usually enough. Lay the parts out in the order you removed them.

3. Cleaning the barrel

• Run a solvent-soaked patch from chamber to muzzle in one direction only. Working back and forth pushes fouling back in.
• Repeat until patches come out clean, then finish with a dry patch.
• Remove the mobile choke tube, clean its threads and apply a thin film of oil. Never fire the gun without a choke tube fitted.

4. Gas system and action

This is the critical area on a gas gun. Residue around the piston is what causes failures to eject or feed. Brush the piston and its housing clean, pay particular attention to the bolt and extractor, and do not over-oil this area — oil turns residue into a sticky paste.

5. Lubrication

The most common mistake is using too much oil. A thin film on bearing surfaces is correct; oil that pools attracts dust and fouling. Wipe external metal, especially where you handle the gun, with an oiled cloth — perspiration causes rust. Do not put metal oil on a wooden stock.

6. Storage

• Store in a dry, ventilated cabinet. Moisture is the primary cause of rust.
• Use a desiccant and replace it regularly.
• Do not leave the gun in a soft case for long-term storage; cases trap moisture.
• Keep the firearm locked and out of reach of unauthorised people — a safety and a legal responsibility.
• Check external surfaces monthly during long storage.

How often

When to see a gunsmith

If ejection or feeding problems persist after cleaning, a worn part may be the cause. Take the gun to an authorised service point rather than attempting a repair yourself — tolerances are fine and an incorrect repair creates a safety risk.