Can double skin of slingshot increase strength?

This operation can't increase strength.

The power of the slingshot depends on many factors, including the mass of the projectile, the tension of the slingshot, the curvature of the trajectory, the distance of the shooting target and so on. Double skin slingshot can not directly increase the strength of slingshot, but can only improve the accuracy and stability of slingshot by increasing the friction and stability of rubber band. In the tension of the slingshot, increasing the length and thickness of the rubber band can increase the tension of the slingshot, thus increasing the muzzle velocity and range of the projectile.