They do look nice. It might be an added benifit to add just a bit more tin as said, antimony?maybe, but I'm talking just 1/2% to toughen them up so they don't flatten quite as much. But to much and they will start to splinter.Softer is definately better for a good hunting bullet. Harder(14-15bhn) is good for targets and velocities.
Those molds all MP's or some from NOE?
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