Re: what happens to lead at high velocity 3000 fps+?
At high velocity even with lubricant added it can melt in the rifling causing your rifling to clog and making cleaning difficult. Accuracy will also suffering. This is why it is necessary to use a gas check when shooting higher velocities with cast bullets. It you plan to shoot 3000fps a jacketed bullet is necessary. I would venture a guess that at any speed above 1800fps a jacketed bullet should be utilized.
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