Do the Uberti 1875's have safety notches to rest the hammer between the cartridges, like a ROA or a 1858 Remington cap-n-ball revolver? I'm not even sure there's enough room between the case heads that it's possible when chambered for .45 Colt.
Or maybe the 1/4-cock notch on the sear is drop safe?
Or maybe the 1/4-cock notch on the sear is drop safe?