Usually, there is a floor plate area just in front of the trigger mechanism, ahd you slide the shells in there one at a time with the brass toward the trigger; that's in a pump gun. Remember, it will only hold 3 shells in the magazine, but go ahead and pump it once, and you can put another in the mag, thus having 4 usuable shells in the gun. Obviously, if it's an over/under, or side by side, you have to break it open and slide the shells in one at a time.
Depends on the shotgun- different types load differently.
NEVER ATTEMPT TO LOAD THE WRONG AMMUNITION INTO A FIREARM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Do not do this
You put shells in the magazine.
A shotgun shell made for the game of trap shooting.
5-50m depending on load
Depends on what gauge, what load and barrel length
7-100 m depending on load
You need the services of a gunsmith
You need the services of a gunsmith
Given the right load and shot placement, yes.
No
Follow manufacturer provided instructions.