I have loaded 3.8gr of HP38, COAL of 1.03 and powder coated, sized to .358. They shoot great and accurate but i am getting leading from the middle to the muzzle.
Do i need to reduce the charge or more? since its fast burning powder? maybe switch to slower powder?
2 guns(Shield slugged out .357 and PT111 G2 slugged out.358)
I have read i should be .001 to .002 over the bore but that doesn't explain why its leading for the shield.
Also i have smashed the PCed boolit and PC stays and does not flake of break off.
i am using range scrap