ok i'm not sure about this and i know it happens in limit but in NO LIMIT is the betting caps at 4 raises?

say 1pos raises min from 50 to 100, then 2nd pos raises 100 to 150, 3rd pos raises 150 to 200, then 4tf pos raises 200 to 250, can 5th pos raises from 250 to 300, or is it stopped at 250, or is the only raising option all-in?