Thread: HELP OAL gauge and bullet comparator problem...

First of all, check your vernier to see that it is consistent, maybe it needs fresh batteries ?

Second, use a single projectile, and repeat the measurements several times.

You have to apply consistent pressure on the rod, either by developing a feel for the same force, or using a (light) weight on a string to act as a pendulum hammer type setup. I just tap the back of the rod with my finger until I feel the projectile engaging the lands. If you get marks on the projectile you are using too mush force.

As far as seating the VLD's you may need to drill out the stem in your seating die to ensure that it makes contact with the ogive rather than the projectile tip.