Soak in diesel overnight to loosen dirt/debris, use choke key supplied with gun
This is a job best left to a trained gunsmith.
Follow manufacturer's instructions.
No. A choke tube slips into and screws to the muzzle end of the barrel. It can only decrease the inside diameter.
4 notches = cylinder choke (open), and one notch = full choke (tight)
Possible, but, not recommended.
Not unless you have to change the choke tube.
You can purchase a choke tube for a Smith & Wesson 3000 shotgun at various sporting goods stores, specialized gun shops, or online retailers such as Brownells, MidwayUSA, or Amazon. It's important to ensure the choke tube is compatible with your specific shotgun model. Additionally, checking manufacturer recommendations or forums dedicated to shotgun enthusiasts can provide guidance on the best options available.
Never fire a shotgun without a choke tube installed. DANGER, DANGER, DANGER
Try e-gunparts.com
No no no
With removeable chokes, it's simple, replace the tube. Otherwise you have to find a really good gunmsith.
A choke looks like a small tube that you screw in the mussel of some shotguns. It changes the pattern of BBS as they fly exc. a full choke will force the BBS into a smaller pattern than an improved cylinder. Hope this helps