That post looks a little unclear o the different 50's Winchester made, so maybe this will help:

.50-95 was a short cartridge (case is ~1.76 inches) made for the toggle-link Winchester 1876
.50-110 was a longer cartridge (case ~2.4 inches) made for the Browning designed 1886
.50-100-450 was same case as the .50-110 but with a heavier bullet
Case used for the .50-110/.50-100-450 was later bottlenecked and became the .348 WCF used in the Model 71