I was always taken with the concept, however none of the variants were ever standardised ie SAAMI recognised. Very hard to get the specs for them. The JWH is probably the worst in that (from what I've heard) it was a one off clone from the 38 Casull with changes to some dimensions to avoid patent/copywrite problems. Pretty well means you're on your own trying to get dies, cases, or reliable load data. Still, might be a lot of fun trying.

I'm cynical enough to wonder whether it was an attempt to stick it to old Jackboot, or a scam to cash in on all the 45 owners desperate to keep their guns.