I have a winchster ser # list , I can look it up to determine the year of manuf. There are some VERY EXPENSIVE tang sights on the market, and are made to shoot at VERY LONG ranges but I wonder if your "worn" rifling will do them justice? On the other hand some decent sights are made in Italy wich may be more to your liking Around $50.00. Most are made on 1.510" centers, (are there holes already drilled?) Many gun shops carry these. As for loads, I don't shoot a 32-40! BUT WISH I DID!!!