But those long range guns are firing just a few rounds, before copper fouling shows up, aren't they? Kinda different from low pressure FMJ or hard cast lead I'd think. Also, I suspect they are far more easily damaged from improperly cleaning--well, it's just as hard, it's just that the average person would really have to bugger up a bore before they see inaccuracy w/in 100yards.
I'd think that as long as the sliding parts are lubricated and clean, and working properly, and the barrel clean of fouling, then all is well. For myself, a gun that has to be cleaned often is annoying. If it can't go a couple of range sessions w/o cleaning then I have to doubt its reliability. That said, it should be easy to check a gun: I mean, if the slide is stiff, it is not cycling well, the cylinder doesn't spin freely, and you can't look down the bore--then half the time between cleanings.