Reply To: thickness of the steel sheet to stop pellets
You definitely want something to catch the pellets-I’m assuming the phone books will stop your pellets and the steel is insurance. 1/8″ should do the trick. If this is your bedroom be conscious of possible lead dust from fragmenting pellets, it’s not healthy to breathe lead dust and you spend around 8 hours a night in there so be aware! I use a cardboard box stuffed with old rags in my garage which does a good job containing the pellets, not sure how effective the phone books are at containing lead splatter.