12mm Lead catapult ammo
Lead ammo packs much more of a punch than steel, ideal for hunting but also fun if you like to see stuff move on impact. Devastates a tin can
Using heavy ammo is the fastest & easiest way to increase the power of your catapult.
11.3mm.or .445 caliber Lead Balls about 8.6g (133 grains) Obviously there may be some slight variation from ball to ball.