It is possible to fire a shotgun without a choke, but it is highly not reccomended, and they don't cost that much
If you select a barrel with no choke (cylinder) it will cause the pattern to be looser than for a barrel of a shotgun that has a tighter choke. The extreme is "full choke" which keeps a tight pattern out to the effective range. Full choke is typically used for waterfowl.
A shotgun that is pressed into double duty (shot for small game and slugs for big game) would work well to have modified choke. Slugs have to be designed to fire through a full choke without blowing the barrel but you will certainly shorten the life of the barrel by firing slugs through a choked barrel. If you can afford an extra barrel, then use a cylinder (no choke) for slugs.
Remington and other shotgun manufacturers have interchangeable choke tubes (see link) that allow you to screw in the appropriate choke for your quarry.
No
Both shotguns and cars have chokes. How they are adjusted depends of the particular shotgun or engine- we need more info to give you a real answer.
Why yes, and for cars all tires are the same. . . .
Chokes for shotguns shrink the bore's diameter to tighten the shot pattern and increase practical range.
A good basic article on chokes http://www.ssaa.org.au/stories/shotguns-a-beginners-guide-to-shotgun-chokes.html
A choke is a muzzle-end taper that narrows the barrel of a gun. The majority of shotguns come equipped with chokes, but they can also be found on rifles, pistols, and even airguns.
With standard chokes, Full Choke is the tightest. However, there are non-standard chokes for SOME shotguns (used by turkey hunters) that are Extra Full Choke.
With standard chokes, Full Choke is the tightest. However, there are non-standard chokes for SOME shotguns (used by turkey hunters) that are Extra Full Choke.
There is an excellent article at the link below to explain the choke process for shotguns.
You will need to supply the serial numbers to your shotguns to get the age of your browning shotguns correctly.
The first year that the Rem Choke or screw in choke on Remington shotguns was 1986. It made the already famous Remington 870 even more popular.
MOST shotguns do not have a rear sight, no matter what choke. Slugs can be fired thru most shotguns (except the rare Extra Full, or adjustable chokes) Shotguns can be bird guns, or big game guns w/ buckshot or slugs.