I shoot a lot of box birds, and so have become a huge fan of the big pigeon guns. In the condition you describe, that Purdey is a magnificant thing. You will find, if still choked as original, that it will likey be a tough mistress as target gun. Those lads at the turn of the century knew how to build chokes and both my Cashmore and Greener shoot very tightly indeed. Both are wonderful on Kansas pheasants and waterfowl. You likely will find it tricky on a clays course on some of those 15-20 yard close targets. That said, I would strongly urge you to make that one yours.