“In New Jersey a flintlock is an assault rifle.”
A .58cal black powder rifle, 580gr ball, 1250fps, will defeat most body armor issued to cops.
Easily.
As will a regular 30.06.
I doubt it will pierce the kevler, but it will probably penetrate the body and drag it inside with it!
I’ve never gotten into into the black powder muzzle loading game but I’ll take the Civil War’s word for it...they kill! Up there in heavy 45 70 country.Like a pumpkin size chunk of lead coming at you!