>>1400558>before I put rocks in one of those things.Don't use rocks. They can damage the bands and frame. Use ammo that is matched to the bands. For instance, lightweight ammo and overpowered bands will result in painful hand slaps.
https://simple-shot.com/safety/https://www.dankung.com/article/no-dangerous-zinc-dankung-counterfeits_1302>>1400480Improperly matched ammo to band strength and vice-versa. Twisted tubes/bands. Improper holding technique when releasing the pouch. Improper stance when pulling the pouch back. The pouch is too large or ammo too small or both. Using old bands/tubes on one side and new ones on the other side.
Slingshots are extremely dangerous. No matter what you do, you'll more than likely get hit in some manner. Always double check the bands/tubes for tears, splits, and cracks before EVERY SHOT and replace them when they start to crack/split/tear. ALWAYS check the pouch and bands for twist to make sure the pouch has not flipped around. Flip it back to its natural position. Always replace both sides at the same time too. ALWAYS check the frame for signs of damage and trash the entire slingshot if it does show signs of damage. Always wear eye protection; preferably goggles that fits snugly all around your eyes. Some people even wear mouth guards. Yes, people are blinded and lose teeth while using a slingshot.
Use a slingshot calculator and a guide. Match the ammo to the band you make.
http://www.slingshotchannel.com/band_calc.html 