they take the same chokes as the remingtons these are easy to find.
The Winchester 140 12 gauge has a choke barrel at 28". This is the same choke size as the 20 gauge model.
.020
You don't give us the model, so it is hard to answer the question. Assuming the gun does not have an obvious adjustable choke, the choke is probably not easily adjustable. A gunsmith can open the choke (from Full to Modified for example) or can install internal interchangeable choke tubes (costs around $125).
the 410 mossberg model 183d-a is a bolt action 410 gauge shotgun with a tree round mag well and has two interchangeable chokes full choke and modified
They came in various barrel lengths and choke combinations. If it is not marked on the side of the barrel, you will have to pattern the shotgun to determine the choke
It has a nickel steel barrel and is a 12 gauge with a mod choke. It has a nickel steel barrel and is a 12 gauge with a mod choke. It has a nickel steel barrel and is a 12 gauge with a mod choke.
If it was made to shoot steel shot and has interchangeable chokes.
The 12 gauge pump Western Field shotgun, M550ABD with a c-lect choke is valued at $200 in good condition. It is valued at $100 in fair condition.
What gauge and grade is it?
100-400 USD
With the right loads and choke, yes
no