hi Ramrod------its a mill job, drilling and reaming the cavity block, setting a 3/16 dowel pin in the Harig grinding fixture and turn grinding the core pin---the core handle is simply a piece of 3/8 cold rolled steel----the core is held in place with set screws-----the handle is just a long 6-32 screw---simple and effective.
i'll replace a section of the mold blocks with hard steel if the bullet performs, so things will stay fit properly-----terminal performance test photo's next week i hope.
Have a great Thanksgiving Holiday
Dave