Powder Loads For Simpson Strong-Tie® Powder-Actuated Tools, Yellow. Use in tools from Simpson Strong Tie, Ramset, Cobra, Viper, Hilti, and Remington. High quality and dependability. All loads are color coded and load level numbered. As the number increases, the power level increases. Always start with the lightest strip load. If the fastener does not set completely, use the next higher load and repeat the process.