Any pilot that flies any big piston twin knows these are bad performers on one donk. The live engine will take you to the crash sight.
The other day I saw one of their Chieftains out and about with a chunk the size of a cc out of the leading edge of the prop.
Remember the manual of stats on these aircraft are based on brand new aircraft, new props, new donks and a very experienced test pilot at the controls.
These aircraft are well overdue to be taken over by turbine aircraft that still can deliver performance when needed.