A projectile is provided for delivering a payload from a smoothbore launcher to a target. The projectile includes an aerodynamic stabilizer, an extender along which the stabilizer can longitudinally translate, and a chamber connected to the extender to contain the payload. The chamber can include a plastic bag for containing a liquid that represents the payload, and a plurality of holes that radially extend through its wall. The stabilizer enhances post-launch directional stability of the projectile by longitudinally translating rearward along the extender to shift center of pressure of the projectile aft of center of gravity of the projectile. The bag ruptures upon contact with the target, thereby disbursing the liquid through the holes. The bag can include malodorant or paint. The projectile can be contained within a gunpowder-loaded shotgun shell for launch.