Do me a few test loads.
Size 3 pieces of brass.
Now the fun part,
using the bullet seat die, with no bullet,
back the seating die out 4 good turns.
run the 1st piece of brass up into the die.
Now turn the seat die down till you feel the neck start
to enter the "crimp" part of the die.(just do it)
You can take the bullet seater plug out and look down into the die to see this.
Remove the 1st piece of brass and compare it to the other 2 pieces if brass.
See if it started to crimp, if not turn the seating die down 1/2 turn and push the brass
back up into the die, repeat as needed till you see the crimp start to form.
It should "roll" crimp. Red arrow is where the crimp will happen.
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