Description:

Unhardened carbon steel balls, 3/8" (9.5mm) diameter — a popular choice for catapult and slingshot ammunition thanks to their solid weight and consistent size, at a lower cost than precision-ground alternatives.

These balls are supplied without heat treatment, making them suitable for non-precision applications where extreme hardness or tight tolerance isn't required — ideal for target shooting, plinking, and general slingshot use.

Why choose unhardened carbon steel for catapult ammo?
Unhardened balls cost less than hardened/precision-grade steel while still giving you the weight and consistency needed for accurate shooting — a smart choice if you're shooting in volume rather than needing lab-grade precision.

Supplied by Bearing Warehouse — home of the BR® brand. One of the UK's largest suppliers of catapult ammunition, with 30+ years' experience supplying loose balls and rollers worldwide.

Need a different size or material? We stock diameters from 0.25mm to 250mm across a huge range of materials — chrome steel, stainless, brass, ceramic, and more — and can also source specialist/non-standard materials through our worldwide supplier network. Just get in touch.