Years ago I had an '86 in 38/56. It is a snap to form cases from 45/70 brass; works best if you use new Remingtons, at least it did then, because they were not cannelured. Any bullet, lead or jacketed, made for the 38/55 will work pretty well, although some bores tend to be a little oversize. This is one cartridge that can be formed without special forming dies, just the sizing die will work just fine with a little patience and some good case lube.