One of the contributory causes of landing over-runs is excessive threshold speed
As an ex DHC-6 pilot, and a current 747-400 Captain, my experience on limiting runways, is that you have to, absolutely have to, land at the beginng of the runway. Do not float, stick it down and get on with the business of braking. A few extra knots is not an issue. The issue is that if you land half way down, you are going off the end.
L337