Has an Olympic Hockey (Men) game ever ended 16-5?
Exactly once. On February 5, 1948, Austria beat Italy 16-5, and no Olympic Hockey (Men) game before or since has ended that way. When it happened it was a scorigami, the first 16-5 in league history.
That makes 16-5 the 75th most common final score out of 99 that have ever occurred in Olympic Hockey (Men). One point away, 17-5 has happened never and 16-6 has happened never.