Home Forums Reloading Big Game Rifles Measuring Shoulder Bump

An in-expensive option I have used has been utilizing a empty pistol case and caliper to reference length of fired case vs a case that has been lightly bumped. Removing the primer on a fired pistol case helps with consistency.

Otherwise slowly working up to bumping the shoulder back in very small increments and testing the fit when closing the bolt. Perhaps placing a layer or layers of tape on the base of your cartridge, to test fit after bumping the shoulder back to gauge the fit may work for you if you are working with a bolt action.