The basic question?
1: What is the maximum velocity a lead boolit of reasonable hardness can take before it starts stripping the rifling off the boolit or begins leading the barrel?
I have read somewhere that 1800 fps is supposed to be the maximum no matter what, however a harder boolit will be stronger so there is that.
2: How much difference does adding a gas check make to preventing leading the barrel at increasing velocities?
Or I should say, can we get copper jacket velocities with harder lead and gas checks?
3: Does Powder Coating the boolits make a difference to prevent leading?
I have read where those who powder coat seem to get Full Metal Jacket velocities and similar performance out of powder coating hard lead projectiles.