Specifics on "stopping cartridges"??

You could set up a sequence of increasing cartridge "stoppers" if you have one agreed upon reference. The reference would obviously have to include the object shot as well for constancy-

For example--if the 458 Wm solid at 2150 was good for Ele the a safe assumption would be cartridges of similar bullet type/velocity attaining the same agreed depth of penetration but larger diameter should be "better" stoppers.

A better stopper would also be one attaining a deeper depth to a point of complete penetration of the animal as compared to the agreed upon standard. How to compare against larger bore, similar penetration?? I dunno--

Fun to think about anyway--