Just a short video showing the type of fragmenting airgun slugs that can be produced. These are the type of slugs that @swish and I have been making, shooting and testing this last year. For small pests (especially at long range) were rapid expansion is needed at low velocity nothing is even close to these in performance.
https://youtu.be/TbsD43gdiFM
https://youtu.be/TbsD43gdiFM