I'll throw a new ammo into the mix DRT. (drtammo.com).
This ammo is sort of like glasser or other frangibles except it is actually a powdered metal compressed to make the slug that literally dissipates to dust on impact. It will not richochet, it will not penetrate hard surfaces, it is designed to stay together through soft surfaces such as clothing and penetrate but dissolves upon impact with flesh creating a HUGE wound and viturally guaranteed instant death.
I personally have not had the opportunity to test it yet, but I want to. I do not really see it as carry ammo because it is too restrictive in its penetration in the field, however for in home use, I am thinking it may be the perfect "safety slug" with little chance of wall penetration, yet high stopping power on the intended target.
It is apparently currently under military testing, hopefully more information will be forthcoming.
By the way ... THANKS FOR ASKING! Information is always being updated and often new information is not shared until someone asks the same old question over again.