Basic physics...humm.
I respectfully disagree regarding the straight line penetration of bullets that have the most remaining shank. If that conclusion is correct then a solid would be the best of all and there are many examples of solids veering off of a straight line.
Likewise, there are many examples of hard cast .44 magnum handgun loads penetrating both deeply and in a straight line. Those bullets are heavy relative to their length and are wide compared to to their length as well.
Consider a bicycle wheel. The faster it spins the more likely it is to maintain its upright position because of the force vector extending at a right angle thru the center of the hub. It is called centripetal force.
I am convinced an expanded bullet that is spinning more rapidly and has its mass more away from its center will maintain its course. Bullets are not javelins or boats; those “common sense” analogies don’t hold up.
Last edited by RinB; 05/04/20.
