it's your gun... i had a 100ft/lb 1/2 gun and a 200ft/lb 1/2 gun when i did my body lift, neither did anything, so i went and bought a campbel hausfeld 450 ft/lb gun from home depot for $100, and it still didn't do anything on a single bolt (other than over work my compressor) bought one of those small propane torches and used a snipe on a 1/2 ratchet and every bolt came right out...