Having sized, primed and charged our brass, the next step is bullet seating. Many approaches are possible; one that works well follows. When setting up a standard seating die, insert a sized, trimmed case into the shellholder and fully raise the press ram. Next, back the seating stem out and screw the die down until the internal crimping shoulder touches the case mouth.
Focus on not inadvertently exceeding the boundaries of known, safe data.
In Part 1, we measured the pre-firing bearing surface length. When the bullet is thrust forward upon ignition, it is pressure-swaged to fit the bore.
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