Make sure tou use copper plated shot so it doesn't deform and blow out your pattern
The copper plated pellets are just copper washed and add very little to increase penetration. Winchester offered "Lubaloy" copper pellets years ago which were electrolysis
plated which hardened the pellet, the plating process became to expensive so eventually discontinued.
Those shor manufacturers offering copper plated pellets don't disclose the antimony content of the plated pellet so you don't know whether the pre-washed pellets are just 3% antimony or 5 to 6% antimony. Always chose a "Magnum" or a "Nickel" pellet to fill your bird limit with less bird lose.
