500 rounds through my 22 in one range trip is not unheard of... but its usually about 300-400. (though my 10/22 will see 500 rounds easy)
My other pistols see about 100-200 per trip. If I take both my 9mm and 40, about 100 each, if only one, 200 rounds on average.
For a new pistol, I ensure its lubed well before first firing, and after about 100rds, I give it a quick wipe down inside and out, then re-lube. I do this for the the first 300-400 rounds, as that is when parts are wear fitting.