Old School Ammo ...
Adamantium ... the difference is a SWC doesn't cost as much as HP ammo.
For the person that mentioned a 150 year old revolver ... would we be referring to Wild Bill Hickok's .36 1851 Navy revolver, and the 75-yard heart shot?
For the person that mentioned 'Glock' in their response ... I have never owned one, but I do own a BHP.
I have seen -both- the water jug, and the denim-covered gelatin tests videos. But for the writer who mentioned something about 'shooting through something else in front of the target', that's police work, not something that an old geezer like me would have to worry about, in the protection of my own life.
"Please keep them cards and letters coming, folks!"