So ive had an 1187 as my main slug gun for about 10 years. This past season the area that i gunhunt has switched to allow rifles. So I bought a smooth bored barrel with chokes to use as a duck gun and several rounds of sporting clays a year instead of the nicer o/u seeing the bad weather. It worked great with the heavy loads through the light gun club reloads until this spring in which it got soaked during turkey hunting and hasnt cycled consistent since with any loads. I stripped and cleaned everything well and the oring is still intact. There is a spring that seems to go into the buttstock that has rust residue that comes into the action a bit but i cant seem to figure out how to remove it and soak/clean it. More often then not the bolt locks open after the first shot and the remaining rounds are not loaded. It still will cycle and load the second shell but only about 25% of the time now. Im not sure if the mag spring is going and not feeding the next round or if its the spring that goes rearward into the butttstock that is hurting the cycling and not allowing the action too fully move through the motions. Any thoughts would be appreciated.