Its sounds valid, but is it? We investigate.
By Jeff Johnston
With turkey season on the horizon, studious turkey hunters will notice myriad new choices in turkey loads and begin thinking they should try one. Then, which shot to use? No. 4's? No. 6's? Which one patterns better in the gun? And which will penetrate better?
The fallacy in [this idea] is obvious when it is carried to its logical conclusion, that a round cannonball would penetrate a much shorter distance than a small shot pellet.
The belief would be correctly founded if penetration by shot pellets took place as the result of an outside force applied t the pellets during penetration, pushing them through the target. This situation does not exist.
The only force carrying a projectile through its target arises from its own velocity and weight. Assuming like velocities, then the only factors making for different penetrations by non-deforming round shot will be weight and area. The weights of spheres of the same material will be to each as the cubes of their diameters.
Lets skip a bunch of mathematical formulas...
Conclusion for Turkey Hunters