The value of a 12 gauge featherlight shotgun is $800.00 bucks canadian.
S&W never made a Model 1300 XTR shotgun.
Yes: A Remington 870 shotgun with a modified choke will shoot any commercial shotgun slug.
From a recent internet search, a 16 gauge fetches roughly $385.
If your shotgun has between 60%-90% of its original finish remaining and a good bore,then 200-400 dollars.
You will need to contact Ithaca. Published sn's do not go that high.
* Full *- Improved Modified ** Modified **- Improved Cylinder **$ Skeet *** Cylinder Bore
Describes the amount of choke.