Depends on the guage and length of the shell, and the size of shot used. It may be as few as 3, (.410 Buckshot) or as many as several hundred (10 g birdshot).
The number of pellets contained in the shell will depend on the size of the shot.
That depends on the size of the shot in the 3 inch shotgun shell,and the weight of the shot.
pellets, powder
Depends entirely on the gauge and size of shell. Can vary from 9-30
None. If you are asking how many pellets, the answer depends on the load. It could be anywher from less than 10 to a couple of hundred.
OO Buck contains nine .32 sized lead balls.
The arrangement of star pellets inside the shell.
Depends on the size of the shot, whether the shot is lead, steel or something else, the weight of the load and the gauge of the shell. A lead 1 oz load of #6 birdshot is about 225 pellets.
In fact, many products appear in forms of pellets. They can be used in many fields like animal feed pellets, bedding pellets and home heating pellets,etc.
It depends on what kind of shot/cartridge you use. Shot, being the pelllets inside the cartridge, come in many different sizes, from 1mm to 9mm.
Steel or lead pellets... you know, the stuff they already come loaded with.
No, not advisable.