You contact the Cody Firearms Museum.
@52,400
Proofhouse.com
The Winchester Model 190 is famous for this problem if they are not cleaned properly and reguarly. You might want to contact US Reapeating arms they offer free manuals on almost all Winchesters with detailed instructions on how to care for them.
they weren't Winchesters. They were Henry rifles.
1892 Winchesters were not made in 357
Your Winchester model 1500xtr was made by Winchester from 1978-1982.
these winchesters are going for between 75-200 dollars,depending on condition.
http://armscollectors.com/sn/windates.htm
By providing a detailed description of your Winchesters overall condition;including the amount of original finish remaining on the wood and metal,bore condition,and serial number to age your Winchester(either pre,or post 1964 construction).
Here is one I use for dating winchesters: http://armscollectors.com/sn/windates.htm
You'll need to post the Model number as well.Winchester serial numbers were not unique.2 different model Winchesters can have the same serial number.
Go to ArmsCollectors.com LOOK FOR Manufacturing Dates for Winchesters...