I have fired my 590 SP over 7,000 shells the first year I had it. Never once have I ever cleaned it past taking the barrel off and giving it a scrub. The only problem I have ever had with it was after market products breaking off (Side saddle, swivel bolt.) Then again, I have never purposely dry fired it. :rollseyes:
When I shake my 590 SP, something raddles inside, no idea what it is, i'll worry about it when the time comes. I have replacement parts for almost every firearm I own, again i'm not worried.