Exploding rounds have one shot stopping power?

Some mordern day smallarms ammunition manufactures are having specially licenced exploding bullets for rifle and also handgun caliber round that seems to have 5 to 10 grams of impct explosive formerly acetone peroxide togeter or not with poisen as liquid mercury and energetic reactive metal powder magnesium aluminum hydrides or the sorts to get some fantastic kills due to explosions on impact and if it is licenced it should be true is it? and is it true for armored targets as well as others in a allaround best round compititions first runnerup.