Unless you have a specialized gun case with a dehumidifier, your guns, stored in the case, or in a house, are exposed to the elements. There is Always the possibility of condensation forming. Over time, all shotgun chambers no matter how well cleaned will be affected by a constant changing of temperatures and humidity. These include oil breakdowns, bluing protection breakdowns, moisture buildup, pitting, and worst of all RUST. For the effectiveness and safety that your weapon needs, use the Chambermaid

RUST DON'T LET THIS HAPPEN TO YOU

This is a 12 gauge Mossberg 500 series shotgun that was barely cleaned, put in a case, and stored in a closet. WITHOUT A CHAMBERMAID! One year later this is what it looked like. ASTONISHING! The inside of the barrel had a ring of rust all the way from the chamber to the end of the barrel. We could not believe that much rust could form inside a shotgun chamber in such a short time. Since using the Chambermaid, it’s been RUST FREE.