Home Forums Reloading Big Game Rifles Measuring Shoulder Bump

I've used my bullet comparators to check shoulder bump a few times and I don't see why it can't be just as useful a technique as comparators made specifically for shoulder measurement. As an example (IIRC), the .30-cal comparator can be used for shoulder measurement on a .223 case. I generally use collet neck dies anymore, but if I have to set up a FL die I go by feel, making use of the fact that the shoulder will often flow forward slightly before it contacts the surface in the die which pushes it back. Very small adjustments of the FL die will move the shoulder 0.001 inch.