Picked up a Taurus "circuit judge" today at a LGS seemed like a novelty. I can't really see the practicality. They had 2, one with the standard 'judge' cylinder (45,410) and a shorter cylinder model in 44mag. The only use I see is if you only owned a 44mag or 45colt handgun and only wanted to but I type of ammo.
BTW, the idiot at the LGS, kept saying it took '45 long colt'. Then proceeded to sell a guy (who said hes not into target shooting) a box of FMJ ammo he called full metal case, target ammo he claimed was great for home defense. (I had been holding my tongue, but At that point I had to chime I that 'target' ammo was only really good for punching holes in paper)