My 336 will make about 250 bales an hour - 45 lb or so. My 348 will do about 300 or so same conditions.
It's what 90 strokes per min, I like at least 10-11 flakes so about 9 bales a min x 60 would be 540 bales an hour but I've never kept it over 400 average. To much turning etc hooking wagons etc.
When my 336 was newer I tried to see what it could do, it will make 4-5 flake bales at high rates. Terrible to feed or sell though and easy to plug pickup doing that.