[boati]

https://www.youtube.com/watch?v=6dgrup7W1lM

/Same velocity as my 9x21mm Split Nose from a 3" barrel, but 25% less bullet weight. and a lot less penetration.

 

[boati]

the vid is jerry micuek, using 36 gr 357 thunderzap plastic bullets.

 

[John in AR]

What about plain flat-end nylon rod cut to length, as Bowman used in 'Unintended Consequences'.

It could have a lot of energy up close, as long as a person accepted that it wouldn't be much of anything past bedroom distances.