Reply to didn't work for me... by jon. - Forster Bushing Bump Neck Sizing Die and three Neck Bushings

Jon: The Forester bump die kit includes the die and the bushings... not the RCBS headspace micrometer to measure shoulder setback. Also included with the RCBS mic headspace gauge (available here at Optics Planet) is a plastic bullet to find the cartridge overall length. Assuming you have a Forester press the RCBS headspace gauge helps us adjust and set the lockring on the die which adjusts the amount we are able to push the case shoulder back.

Wnere you set the lockring on the die will determine how far you can push the shoulder back.

you can also purchase a Forester neck tension gauge (optics planet) to help set the neck tension. I don't remember getting the bushing I needed in the kit and got bushings I really didn't want and had to buy another bushing which was no problem.

Horniday has a threaded case and comparator tool set that can be used to find the maxium cartridge length and can also be used to find and set headspace (which is in no way a replacement for the RCBS mic set).

Once you have the correct measurment tool... now you can set the shoulder back to its correct position every time by adjusting the lockring on the die. Same thing with your full length sizing die.

Our main objective in precision measurement is to prevent setting the shoulder back to far creating to much headspace which can be very problematic.