I think I've seen Pat Marlin's name tossed around in the past, and think I even visited his site concerning the home manufacture of gaschecks, but remind me again where to look into this again. I've slept since then, but would like to look it over once more.
BTW, I checked my RCBS 9mm 124 RN, and mine is absent a gascheck recess. Guess I got a faulty mould.
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