This is true for a lot of gun owners for just about any firearm. I have an 1100 that is about 52-53 years old. Replace the O ring, clean the magazine tube and make sure the gas ports on the barrel are clean. Did a bit of gunsmithing as a hobby for a while. Had a guy bring a Sako that wouldn't fire. Small dimple in the primer. Bolt was gummed up and the firing pin wouldn't advance enough to set off the primer. Cleaned bolt, problem solved. I'm a Hunter Ed instructor. Got two 1187s for a class. Had to use TWO cans of Gun Scrubber to clean them! The 20 wouldn't eject the hull. Noticed the metal ring was cracked (originally covered in gunk) and not letting enough gas to properly work the action.