How thick is the fire gauge used in firing measurements?

The fire gauge used in firing measurements is typically 0.020 inch thick. This specification is developed to ensure consistent and accurate measurements during small arms training and assessments. The thickness is chosen to balance the need for a stable and rigid gauge that can withstand handling yet remains sensitive enough to provide precise measurements of various parameters, such as barrel wear or throat erosion in firearms. Utilizing this standard thickness helps maintain uniformity across training and evaluation processes, facilitating reliability in the results obtained from the equipment.