First of all this is probably the only time I will be on this forum. At first this seems a no brainer. But I am a weekend survivalist and I made a sling that can sling rock a little more then 1" in diameter 120 yards at an angle of about 50-55 degrees. After some research the type of rock I am flinging is limestone which means it weighs about 2 ounces. Lets use say, a .22 caliber bullet. The bullet would weigh a little less then .09 ounces and go around 175 yards at 90 degrees. I have NO idea how to figure this out and am curious to know the answer. So does it take more force to shoot the rock or shoot a bullet?