31382 Federal Irish Brigade Advancing Loading, No.131382 1 30 Scale Matte Finish Single Figure Loading a musket while advancing was difficult, but not impossible. This was due in large part to the invention of the percussion primer, or cap. This self contained, single use ignition device (for a caplock mechanism) was simple to use in comparison with the priming procedure for the flintlock. Before, the soldier had to open the pan, pour out a measure of gunpowder into a holder (said pan), close the pan,