I'd read the Pilot's Operating Handbook and do what it says in there. If it doesn't say "Swing the prop.", don't. Unfortunately, there are hundreds of "old wives tales" in aviation and it takes a bit of time to sort out the little golden nuggets from the big, pointy ended brown jobbies. One of the best sorting methods is to listen for the noise of condemnation. Normally the bigger the noise, the more likely it is that the person is feeding you crap.
PM