Thread: A couple of new toys comp seating die and Comparator for Measuring sholder bump etc

Measuring bump with calipers is all about feel, same thing with base to ogive. Not uncommon to get inconsistent measurements until you learn how to do it with consistent pressure.

there is another way take a look at these videos. https://www.wheeleraccuracy.com/videos

Get a little plastic box and keep one bullet and one case with known measurements as a zero or check. Write on them the measurements. You can get variations when you reattach your comparator. Use them as a verification tool before you start.