During cleaning, what should be used after a patch to prevent rust in the barrel?

Using a well-oiled patch after cleaning the barrel is essential for preventing rust. When firearms are cleaned, it’s important to remove any debris, fouling, or moisture that can lead to corrosion. A well-oiled patch not only helps to remove any remaining moisture but also leaves a protective film of oil inside the barrel. This oil acts as a barrier against humidity and other environmental factors that could cause rust to develop. Ensuring that there is a protective layer inside the barrel after cleaning is crucial for maintaining the longevity and integrity of the firearm.

Options involving a dry patch or damp cloth may not provide adequate protection against rust, as they do not deposit any oil to prevent moisture from settling in the barrel. Air drying without any protective oil can leave the metal exposed and vulnerable to rusting under certain conditions. Therefore, using a well-oiled patch is the best practice to ensure the barrel remains protected after cleaning.