Don't mean to be a pedant, but this bothers firearms people to no end, and we're on a technical site. A "bullet" is just a projectile - a dumb chunk of material. The "cartridge" contains the bullet, propellant (likely gunpowder in this context), and some other stuff.
So the gunpowder is emphatically not contained in the bullet; rather, both the bullet and the gunpowder are contained in another thing, called the cartridge. [0]
Don't mean to be a pedant, but this bothers firearms people to no end, and we're on a technical site. A "bullet" is just a projectile - a dumb chunk of material. The "cartridge" contains the bullet, propellant (likely gunpowder in this context), and some other stuff.
So the gunpowder is emphatically not contained in the bullet; rather, both the bullet and the gunpowder are contained in another thing, called the cartridge. [0]
[0] http://www.gunsandammo.com/gun-culture/9-misused-gun-terms/