Not sure if your referring to the same gun I own , but this is a picture of a Winchester 1300 youth model given to me by my father in 1984 -notice the short stock and 22 inch barrel - The action on these guns are very slick - notice this is the plain barrel model , some had a vented rib
The youth model will have the short reach forearm , in the top picture notice how the
bolt/action is closed but the forearm is to the far rear - this is how you tell if you have a youth model if I'm not mistaken , I remember in the gun box that the gun came with there was a coupon to send away back to Winchester for a full length adult stock , If you have a full length stock with a short reach forearm the gun you now own is likely a youth model with the
Winchester coupon adult stock installed -I'm no winchester expert and I'm not aware of every model ever made , I do know of a compact model made back then ? but am aware of the adult coupon stock - I can take some measurements of mine to compare with yours but the youth model stock is noticeably short on the pull when you shoulder it
I striped down the gun and epoxied the metal parts,polished out the bore and installed a Burris Fast Fire 2 , once the epoxy was on I put a DIY camo job - I didn't have the pure gold 570 in time for the hunt but that is on it now - With just the factory full and 3 inch mag blends it shot pretty good , HEAVY RECOIL with this load , a limbsaver will go on this gun soon
Bill Davis of Pure Gold recommended the 570 for me because the gun was for my son and I was opting for a solid 40 yard gun with this load , if want to tinker you can play with other restrictions but 40 yards is plenty good for this gun for our needs
Hope this helps , Have fun with the new gun --Shannon