Yes- that is what the poly-choke is for.
Yes
Shotgun with a skeet choke.
For the Stoeger side-by-side shotgun, your best bet would be to use any of the standard Winchester choke tubes. They should fit well for you shotgun.
If it has choke tubes, yes. If it is fixed choke, no. I called Browning about mine and that was the answer they gave me.
full choke
full choke
Cylinder to Full depending on what discipline you are into.
You can, but I wouldn't advise it.
A barrel with a full choke.
Soak in diesel overnight to loosen dirt/debris, use choke key supplied with gun
System of changable shotgun choke tubes made by Mossberg. Accu Choke is their brand name. A shotgun choke is a means of reducing the bore size at the muzzle of a shotgun, to produce shot patterns that spread to a greater or lesser degree.