Capt M
How many times have you read an AAIB report that begins like this
"The pilot of the PA28 was visiting a shorter strip than his home base, he looked up the POH and the 600 M was well within limits.......................... after the aircraft floated 2/3 along the runway before touchdown the pilot braked hard but was unable................ the aircraft hit the fence at the end of the airfield"
"The AAIB considered that excess SPEED on approach was the main cause"
I read such reports far too often.
And yes 400 yards is a piece of cake if you land at the beginning at the correct speed.
Tony