No, you didn't. Standard jello calls for 2 cups per 3 ounces. 19-ish packets requires 38 cups of water. You used 3 gallons of water. A gallon of water is 16 cups. 3 gallons of water is 48 cups. Regular jello is 2.67:1, water to powder. You used a 6.7:1 ratio. The standard Knox ratio from the box is 4:1. The thickest Knox recipe I've seen for ballistic gel is 6:1, the average is 8:1, and they all call for a remelt to increase the density. You didn't answer, or I didn't see, if you did the remelt. I guarantee you, you're overthinking it is what killed your experiment. You took weak snack food 2.67:1 gelatin and tried to do something that called for a 4:1 professional cooking grade gelatin at a 6.7:1 ratio that was 251% more water than what the manufacturer specifies.