Yep. The manufacture of Speer GDHP bullets uses a "special star-stab operation" (their description), combined with designing the laying out the "internal bullet flutes to create predesignated weak points that allow the bullet to easily expand" (their words again) for the bullets used in their different loads. The star stab cut and the internal flutes allow them to refine their GDHP bullets to meet the specific engineering specs for how they want each caliber/load's bullet to perform under the envisioned conditions. That's if everything goes perfectly according to plan in how the manufacturing occurs. I know I've been told by reps from a couple of other ammo makers, and have read/learned of what's been said by at least one other major maker, that they constantly revise and refine their designs, materials and manufacturing methods.