Black powder contains highly corrosive salts that can quickly destroy a barrel.
Ideally, you should clean a black-powder firearm the same day you fire it. Black powder is rich with highly corrosive salts that cling to the inside of the barrel, and the more you fire the gun, the more the salts build up. The salts draw moisture from the air, so they begin to cause corrosion on the inside of the barrel almost immediately. The most thorough way to clean a black-powder gun barrel is by removing the barrel from the receiver and using a cleaner designed for black powder.
Instructions
1. Spread the newspaper over your work area. Remove the barrel from the gun according the manufacturer's instructions.
2. Screw together the sections of the gun-cleaning rod from the cleaning kit. Screw the wire bore brush into the end of the cleaning rod, and work the brush vigorously up and down the inside of the barrel.
3. Remove the wire brush from the cleaning rod, and screw the largest cleaning tip from the cleaning kit into the end of the rod. Thread a cotton patch into the hole of the cleaning tip with your fingers, and saturate the patch with cleaning gel.
4. Work the patch through the barrel, being sure to cover the entire inside of the barrel from bore to breach. Allow the gel to sit in the barrel according to the manufacturer's instructions. Replace the used patch in the cleaning rod tip with a clean dry patch. Work the inside of the barrel with the dry patch. Repeat the process of alternating gel-soaked patches and dry patches until the dry patch comes out clean. Apply gel cleaner to the cleaning cloth, and wipe the outside of the barrel as well as all other metal parts of the gun, including the receiver, sights, hammer, trigger and trigger guard.
5. Apply gun oil to a clean patch, and work it through the inside of the barrel with the cleaning rod. Apply a few drops of oil to a clean cleaning cloth, and wipe the outside of the barrel. Install the barrel back on the firearm's receiver, and give the entire exterior of the gun a final wiping with the oily cloth.
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