"Federal 38 Special" projectile type?

[sksvlad]

How do you call this type of projectile and what’s its use?

[USSubs]

Looks like an early hydra-shok.

[Mwinter]

Early HS as aforementioned; product name also “Scorpion” previously if memory serves. I’d honestly like to see a soft lead full WC-profile no-post HP out there for social use.