What is the most lethal gun pellet?

Any Pellet gun can be lethal. But the most powerful pellet guns and rifles are in the PCP class of weapons (PerCharged Pneumatic) these pellet rifles & guns can be charged to 3000 psi. A 12 gram C02 powerlett cylinder only produces 800 PSI. PCP airguns come in several sizes .177, .20, .22, .25, 9MM, 45 Cal and 50 Caliber. All of these are lethal. The larger bore ones can being down a large deer with ease.

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