Maybe someone can help me understand this. Few days ago I shot with Sierra gameking 215gr bullets at a hardened steel plate at 100m and the bullets when right through. Then I shot the same plate with Peregine (local manuf) 220gr solid brass bullets and they only made a small brass mark. Speed were almost the same. 2670v/s if I remember correctly. Could it be the kenetic effect of the leadcore that acted like a RPG7 would or what is the reason behind this.