The article seems to be aimed at hunters who want bullets that provide good penetration along with reliable expansion. Those attributes are often quantified as weight retention expressed as a percentage of the bullet's original weight and expansion expressed as a multiple of the bullet's caliber. These metrics in turn depend on the impact velocity and the medium through which the bullet passes.

Within the structural limits of a given bullet, the lower the impact velocity the less penetration and expansion, and the higher the velocity the more penetration and expansion. Assuming the target is a game animal the possibility of hitting bone before vitals has to be taken into account. Not knowing the range to the game animal in advance means the impact velocity can't be tightly specified, only assumed to be within some bounds.

The question then becomes one of engineering. What type of bullet construction offers good weight retention and expansion over the widest velocity range while dealing with the possibility of hitting bone before vitals? While under no illusions of magic bullets, many believe that bonded bullets best meet that criteria. A case can be made that partitioned bullets meet the criteria even better, but it's also the case that the further the center of mass is towards the back of a bullet the easier a bullet can be upset and deflected by bone.

I like the Tipped Trophy Bonded bullet. Note the lead core is toward the tip of the bullet, which moves the center of mass forward and helps resist upset during penetration. If not for bonding it's easy to see that weight retention would be less.

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Shooting times has an article titled Predictability Is A Premium that covering a wide range of bullet types.