What size steel ball should be used for 0.55 rubber band?

Slingshot rubber band 0.55 with 7mm steel balls.

Slingshot is a competitive game that is deeply loved by teenagers and middle-aged and elderly people. The 0.55 rubber band is equipped with 7mm steel balls, which is simple and easy to learn and easy to use. Friends who like slingshots know that different thicknesses of rubber bands are suitable for steel balls of different sizes.

The slingshot consists of three parts: a bow frame, a rubber band, and a leather bag. It is made of tree branches and is in the shape of a "Y". The two upper ends of the slingshot are tied with rubber bands, and the middle part of the rubber band is tied with a piece of leather that wraps the projectile.

The power of the slingshot depends on the tension of the rubber band and the rebound speed of the rubber band. The greater the tension of the rubber band, the heavier the projectile can be matched. The faster the rebound speed of the rubber band can provide the projectile with a greater muzzle velocity. The heavier the projectile and the higher the muzzle velocity, the more powerful it is.

The bigger.