...The 44-77 made the world safe enough the 45 calibers could come out of their secure space...
The only reason they made the .44-77 was as a stop-gap measure 'til they got the .45-70 right. In other words, the only reason to carry a .44-77 is to fight your way to a real fighting rifle, the .45-70.
Please note it was the ".45 Gov't", not the ".44 Gov't".
Ed