A 5 shot 45 ACP with some alloy would be a sweetheart. I love 45s and moon clips. The clips aree what raises it above the 44 spec. I heard Taurus makes one, but rare. I looked at a S&W 696 in 44 spec with the idea of rechambering and a 45 barrel. The cylinder has enough meat, but the end of the forcing cone would be very thin unless you could bore out the frame hole and go with bigger threads (N frame sized?). Don't think enough meat under the barrel. Couldn't bring myself to spend the money and work it over that much for a maybe. Bummer. It would make such a great gun.