basically pretty simple.
fired case, bullet, cleaning rod and dial caliper
1. drop bullet lightly into the chamber.
2. Put black bore guide into rear of action.
3. install first collar stop on the rod loosely (will be back one in the picture). Notice the indented portion is to the rear of action.
4. slide rod thru guide until touches rear of bullet slightly pushed against lands. Do not jam in, you can shove it about .050 forward.
5. Tighten first collar stop down and remove rod with stop.
6. use cleaning rod to remove bullet out of bore
7. drop a fired case into the chamber
8. install second collar stop onto rod with indent facing toward the chamber.
9. push case forward until seats but not jammed. Tighten rod stop down
10. take rod with two stops locked down out.
11. measure oal of the bullet and write down.
12. measure distance of the two stops on the indents on the rod.
13. Add the two numbers, will give you oal of loaded round with that bullet "touching the lands"
14. repeat process 2-4 times to confirm measurements. Remember pushing too hard will jam the case or bullet and give you inconsistent readings.
When you have one confirmed oal distance with one bullet touching, you can use a comparator to set up any other bullet on the ogive by just measuring your sample with the other and going with the same distance to ogive on the two loaded cases.
BH
