I ran across an old (~25 years ago) ad for a home swaging kit for RB. You cast a stick of lead, cut it into segments, fit them into a mold and bashed it with a large hammer. Trim off the lead washer around it and you had a swaged RB. It was sold by Senica Run in CO which I assume no longer exists. I didn't have the $35 for one at the time and wonder if anyone used one and if anything similar is available today.