Ruger Mooonclip, 357 Mag, 8 Rounds, Stainless, 3 Pack, Steel, Black 90634 Ruger full moon clips are made from stainless steel and function as a speed loader. They feature an optimized charge hole design for positive ejection over a wide range of ammunition. Ruger full moon clips act as a speed loader for quick reloads and the design allows for loading and unloading without the use of a moon clip tool.