9.3 Check the die bore diameter at frequent intervals with
appropriately sized go/no-go gauges (checked with die at
23 6 5°C) to verify that the die is within the tolerances given
in 5.3.1. Visually examine the die bore to verify that it is not
scratched or damaged. Also visually inspect the land of the
piston foot to verify that it is not scratched or damaged and use
a calibrated micrometer to verify that the dimensions are within
the tolerances given in 5.4.1 (see Note 11).