By looking in the chamber.
Break open.
Where the shell is loaded.
Open the action. KEEP YOUR FINGER OFF THE TRIGGER WHILE YOU DO THIS!!!!!!!!!!!!!!!!!!!
You will have to tell us if they are loaded or empty, whether they are shotgun shells (and the gauge), rim fire or center fire and the caliber.
http://www.texas-on-line.com/gun.html
The cartridges will pop out.
A cartridge for a shotgun. Typically loaded with multiple lead balls (shot).
If it has a tubular magazine, then the plug is probably inserted in there. When hunting, a shotgun is typically not permitted to be loaded with more than three rounds (including the one in the chamber), and the plug is required to ensure the shotgun is not loaded with more than that. It comes out easily enough.
The wooden piece under the barrel of a breech-loaded shotgun is called the forend or forearm. It serves to protect the shooter's hand from the heat of the barrel during firing and provides a secure grip for handling the shotgun. The forend can come in various shapes and styles, often reflecting the design and aesthetics of the shotgun.
Yes, No difference than when loaded.
Remington 870 pump loaded with "OO" buckshot or rifled slug
Yes, there are as well as people who collect other types of cartridges. Both the loaded type of shotgun ammunition and the empty 'hull' of a shotgun shell. If it exists, there is probably someone who collects it.