This thread was a huge help! Yesterday, my son an I were hunting with a SW 1000 and it would not cycle. In the middle of nowhere Nebraska, my son Googled "smith and wesson shotgun not cycling" and found this thread. We conducted field maintenance -- literally -- taking the gun apart and there it was... the black goo. We cleaned it up with gun cleaner, re-assembled the gun, and BINGO... it works like a champ! I simply replaced everything minus the rubber shock washer and it works with low brass and high brass, just fine. 2 3/4 inch shells. JUST WANTED TO SAY THANK YOU to this thread, Tim Berners-Lee (inventor of the WWW), Apple for the iPhone, and Verizon for the wireless service in the middle of nowhere! It's amazing what's possible given all this technology and people williness to share expertise! Keep up hte good work!