What rounds are able to go through body armour?

Answer 1

Armor piercing rounds are made in varius calibers or mm, the most common are 308 7.62x54, 50 BMG, 416 Barrett, 408 chi tec....Armor piercing rounds as a whole or copper coated on the exterior and steel core rounds often used by Military or police snipers. Now as for armor piercing for lets say Tanks or tracked perssonel carriers then most larger caliber such as 105 mm and the M1 Abrahms 120mm fire depleted uranium sabot rounds capable of piercing any known armor to date.

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Further, it will depend on WHICH body armor- it is made in several grades. MOST soft body armor is intended to stop handgun ammunition, not rifle ammo.