Originally posted by aikchongtan:
Unless you want to employ a fully-auto 0.5 Browning HMG at vehicle checkpoint on Singapore, your next less "lethal" and "intimidating" weapon is a shotgun loaded with solid-shot. There are solid shots designed to engage on-coming thin-skinned vehicle frontally. They can penetrate the radiator without losing much velocity and shatter the engine block, stopping the vehicle in it's track with a few well-aimed rounds.
I think you are referring to what is called shotgun "slugs".
Basically, instead of 9 buckshot pellets, you have just one big, chunk of lead with a diameter about 20mm, estimation. (By comparison, a .5 bullet is only 12.7mm.)
This round penetrates by sheer force, as opposed to being sharp-pointed, AP qualities and velocity.
A shotgun slug may indeed disable a car engine as you said. It may laso do so by imply shttering some parts of the engine casing etc.
Uses include being the ultimate man-stopper with the most knock down power and being used by SWAT and spec ops as a "universal key" - i.e. door lock buster. And by buster I mean the lock is simply smashed by brute force rather than by penetration, which is what a normal bullet would do.
Because of the lower velocity and shorter range there is more safety from over-penetration and ricochet.
A .5 is not suitable for police work for the obvious reason of over-penetration.