If the prop is still turning when you landwt can get nicked or break. Program your ESC to apply the brake when you cut throttle, then make the cut high enough to allow time to get the prop horizontal before touchdown.
The perfect landing I'm talking about is coming in and cutting the power about a foot off the ground and pulling up so it lands tail first then the nose. Either way, the prop should not have broken. It was a very soft landing.