you sir have been reading the wrong s**t! cleaning completly effect accuracy!
lets break it down quick and simple (this is goin on the rule not the exceptions)
a clean bore can shoot well, but a fouled bore ( can be any thing from 2-20 shots depending on bore) will most likely shoot considerably more accurate once the bullet has a build up bearing surface to ride on (the copper left behind) on the other hand an overly fouled bore will be innacurate and requires to be cleaned of copper. you will see this when the groups start to open up. some rifles may take as little as 50 shots, while other can be 100s. my old weatherby .223 was a tack drive once the barrel settled in after about 8 shots, but at 60 would start to open up. my current 308 settles in at about 15 shots, but doesnt seem to mind haveing over 250+ rounds down the pipe.
i run an oiled patch down the bore for storage, if its goin to sit more then a few days, but i dont bother giving it a cleaning untill the groups open up