[fabsroman]

Nickel plated shot is pretty much like copper plated shot. It allows for a denser shot string (i.e., tighter patterns) because the shot does not become as deformed under fire (i.e., chamber pressure) as lead. With lead, the shot gets deformed under the pressure it is put under during firing. The deformity causes flat spots on the shot, and once the flat spot hits the air, that piece of shot becomes what is known as a flier. The air catches the flat spot and throws that piece of shot out of the pattern.

Hevi-Shot is extremely tight patterning because not only is it extremely hard, but it usually is formed like a tear drop (i.e., a rain drop), which is one of the most aerodynamic shapes around.