I finally after years of searching managed to pick up an unfired Beretta Silver Hawk slug shotgun.
It's really an outstanding poor man's slug gun, the build quality is very good, it balances extremely well and points very naturally.
The only downside to my mind is the engraving is fairly mediocre and I'd rather have it plain in a case hardened finish.
It's marked as imp/cyl on both barrels but when measured the left is imp/cyl and the left is actually light modified.
It patterns pretty well with all the shells I've tried although it took a while to get the aim right, due to the front sight being quite high so I tended to shot very low.
But after several rounds of 5 stand I was able to ignore the front sight completely and now I shoot as well with it as any other shotgun I've used.
The single selective trigger is fairly crisp if a bit heavy but it doesn't affect accuracy any.
It groups fairly well with the rear flip up sight, although it's not adjustable for either windage or elevation, but it still prints dead on at 50m.
It also shoots more accurately from a shooting stick then from a rest.

So far I've used it successfully on 5 stand, whistling foxes, rabbits and deer. I will also be taking it out for pigs in the future.

The previous owner had a decelerator pad fitted to it and I found it threw off bith the feel for me as well as the aesthetics, so I ordered a Beretta walnut heel plate and fitted it myself, it kicks a bit harder now but it is much nicer to shoulder and looks stunning.