1. Barrle length
2. Bullet type
3. Shot gun type
The only way to know is to pattern your shotgun with as many different kinds of CORRECT ammunition as you can afford. Firearms will often show a marked preference for a brand or weight of shot.
A pattern of a shotgun is determined by the choke at the factory. Some models have a variable choke that makes the user able to change the pattern.
I believe the distance used should be around 40 to 50 yards to pattern your shotgun.
shotgun is the answer shotgun is the answer
To focus the pattern of shot.
Shotgun chokes, whether they be screw-in choke tubes or fixed-chokes (permanent part of the barrel) are used to control the diameter and density of the pellet pattern at a specific distance. Example: An improved cylinder (IC) choke would produce a larger diameter (more open) pattern at around 30 yards. This style of choke is used for close shooting at upland game birds over a pointing dog. A full choke (F) has a tighter constriction so the pattern would be smaller in diameter with more pellets so it would be a better choice for longer distances if hunting ducks or geese. It's always a good idea to "pattern" a shotgun barrel by shooting at a large sheet of paper at various distances to actually see how the barrel's choke and your chosen shotgun shell load react to one another. This way you can actually measure the results of your chosen combination.
Depends on the shotgun- different types load differently.
Each shotgun will perform a little differently but as a rule the answer is "yes" and in theory the result should be a little tighter pattern than with a larger choke at the same distance. However, one caveat to that answer is that the tighter choke may in some cases cause sufficient deformity of the lead pellets so as to disturb their flight enough to enlarge or distort the pattern, especially at longer distances.
it is shotgun because the size of rifle is different than shotgun.
A rifle is a long gun with a rifled barrel designed for accuracy at long distances, while a shotgun is a long gun with a smoothbore barrel designed for shooting multiple projectiles at close range.
Depends on what application it was ported for and by what process.
Slug guns have a fully rifled barrel like a center fire rifle. This helps improve accuracy. A regular shotgun barrel is smooth bore with different choke tubes for a specific desired shot pattern.