If you did feather your props and super dived you’re a/c beyond Mmo then technically you should be able to reach speeds all the way up to Vmo (vne) safely?
Ah...no.
Flutter and aircraft structural damage would more then likely ruin your whole day.
Besides, Vmo is likely to be limiting, prior to Mmo.
And, they are not 'goals' they are certificate
limits, and as such, are
not to be exceeded.