Primal Rights CPS - Step 2: Measure Primer Thickness

Step 2
Measure the thickness of your primer.
You can measure the primer from the bottom of the cup to the top
of the anvil as is seen in the first image, or from the bottom of the
cup to the top of the cup as seen in the second image.
Subtracting the second number from the first will tell you how far
the anvil is protruding from the top of the cup.
So in this example we can see that the primer anvil was
protruding .008" or 8 thousandths of an inch. From here you can
decide just how you want to seat your primers. If you want the
anvil to just touch the bottom of the primer pocket, you would
subtract your primer thickness of .125" from the primer pocket
depth of .128", which would seat the bottom of the primer cup
.003" beneath the base of the case. If you wanted to seat all the
way to the primer cup, completely compressing the anvil into the
primer, then you would subtract .117" from .128" giving you a
measurement to the bottom of the primer cup of .011" beneath
flush.