dgf:
As an owner and frequent user of a DR built on a shotgun action, my opinions differ from those of the above posters.

Beretta is a reputable maker of quality guns, and the Greener cross-bolt is a definite plus. A lot will depend on the chambering, and subsequent back-thrust on the action. What is the boring of the proffered barrel-blanks, and what cartridge do you plan to chamber?

In Australia, these things can be built for around half the going rate for a new Merkel/Kreighoff/Chapuis, and less than half a Searcy. However....

The crux of the matter is proof. If the newly-built rifle survives an honest proof-load (25 to 30% over 'factory'load) for the nominated chambering, then it is no worse (or better) than any other DR, including Searcy etc.

If it fails proof, however, you've done your dough....

Are you a gambling man?
I'm not!: I bought mine 3rd-hand!!

Here's the story.