To load trailers, they want 300-400 around here. Average is 240. Supervisors, when asked, will say 6 per minute, which works out to 360. Seems simple enough. Then you have to go break jams every five scans, or help dig somebody out of their trailer, etc..
The fastest loader in the building gets 420-430 every night in the heaviest area. About once or twice a month he breaks 500. But that particular outbound area doesn't get irregs, and the supervisor pushes his flow to him all night.
I averaged 320. I left the outbounds on Midnight to go sort (and sometimes charge) on Preload. Much easier. A month in, and thus far nobody's mentioned anything about numbers to me.
As for unloading...I've only done it twice. They told me they wanted 1 per second, or 3600 PPH when I did though.