Shop the DEWALT Powder-Actuated Loads - .27 Caliber (Short) Safety Strip Loads, .27 Safety Strip - Brown (2). Powder-Actuated Loads are designed for consistent, reliable attachment of drive pins into concrete and steel base materials. Specific load types are designed for each caliber of powder-actuated tool, offered as single cartridge units for single-shot tools and collated in groups of 10 into plastic strips for semi-automatic tools.