You just proved my point about #2). A generalization only.
Any Barnes or Hornady gmx bullets are much longer than their contemporaries, because of materials used.
In 22-cal... The 77gr SMK is generally able to be stabilized in a 223 with a 9-twist. The 75gr A-max is generally troublesome. Why? Because the lighter Amax is much longer than the heavier SMK.

The flower with another name, could be because it isn't a rose at all.

Generalities can be useful for certain things, but they don't teach us what is truly happening.