I really don’t know much about the Winchester model 12 I bought this years ago and never shot it The length of pull was too short for me . so I recently installed the Graco 575S which will bring it from 13 5/8 to -15 inches now. A good friend of mine who knows these guns very well has informed me that it has a money maker rib and a very tight choke desirable for game shooters (Annie Oakley shooters) I hope my picture will suffice. If you have any questions I’ll refer back to my friend who knows all about these guns. The Graco 575S and pad and installation just cost me $350 For that reason I’m asking $1100