I clean mine after everytime i go shooting. Either that day or within the next 2.
I find that some people say that they only clean their guns say every 500 rounds. Does that mean they dont oil them for 500 rounds as well, or they just dont bust out the solvent?
I found that w/ AA's the gun built up nearly no residue and shucked really smooth even after 250 rounds.
Next time i went out i shot remmington gun club, and remmington all purpose loads, and after 100 rounds i could feel the gun get notably stiffer to shuck, finished that day w/ 300 rounds through her and yeah she was getting harder to shuck for sure.
Broke it down that night to clean it and sure enough there was a good amount of visable gunk in there, while w/ the AA's i noticed pretty much nothing.
THis powder residue seems to suck up the oil and make the gun start running dry.
I will still shoot these dirtier shells but may add a drop or so of oil every 100 rounds with them, or atleast try that and see if it helps, or it just builds up the gunk even more.
To each his own, but i like keeping firearms very clean, and oiled.