 When examining the design of the Browning 1910, it can be seen there are a number of parts that introduce inaccuracy in the movement of the barrel as it cycles.The barrel bushing, slide, pivoting link and the mating of the groves in the slide must all move consistently for the handgun to function.But to function reliably, particularly as the handgun starts to become fouled with powder residue or dirt, these parts must be machined so the dirt that builds up will not cause them to stop functioning.