This instrument offers a highly efficient and precise method for comparing the shoulder position of fired and/or sized cases, as well as measuring bullet seating depth uniformity. Its accuracy and speed make it an invaluable tool for reloaders seeking to ensure consistency in their ammunition. With the addition of the "Range Adapter," this instrument becomes even more versatile, allowing users to take it to the range or field for measurements without the need for a reloading press. This flexibility makes it an excellent choice for both in-shop and on-site reloading adjustments.