Just a couple of thoughts. The Uberti '73 in 44 Magnum is proofed for common over the counter Magnum ammunition. Care must be exercised when hand loading for it though.
Next thought, I would expect the 44 Mag rifle would also digest 44 Special without much if any problem, making it a great partner for a 71/72 Open Top chambered in 44 Spc.
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