Thread: Using comparator tool when seating projectiles.

Zimmers method is perfect

Seat 10 thou too long them measure with the comparator

Write that number down if you need to

Then adjust the micrometer seating stem down for the last amount

Sometimes to get your eye in do another 5 thou then measure again, then you might only have to adjust another three thou after that

If you don’t graphite powder your necks and projectiles the “ stiction” in the neck between projectile and brass makes for jumpy grabby seating

But once lubed the projectile smoothly slides any thou that you adjust
You will get the hang of it quickly

Yes it’s onerous but fun

It’s a good idea to be lubing ammo to assemble it anyway, to prevent galvanic corrosion, which increases the case pressure the tighter the neck and projectile corrodes together.

Ammo that’s been assembled for a long time often has weird large ES over ammo that’s just been made, lubing on assembly fixes that