Find a good gunsmith.
i think that it can only hold 3 shells
Not sure how old this request is. I shoot this shotgun, can help you dis-assemble. Bill 318-268-1514 Shreveport, LA
S&W never made a Model 1300 XTR shotgun.
The value of a Winchester 1500 XTR would depend on a couple different things. Some of these things would include the age and condition of the Winchester.
With the XTR marked on your shotgun,this indicates that it was made between 1983-1989.
4
The Winchester model 23 XTR shotgun was made from 1978-1986.I would contact Winchester directly to get the year of production.
£2500
475
100-400 USD or so
Winchester used the XTR suffix from 1983-1989.I would assume that your shotgun was also made during this time frame.