Uh, aren't the .30-40 Krag and .30 US Army different names for the same cartridge?
Yes, and no. The official name of the military cartridge is the Cartridge, Caliber 30, US Army. It is often referred to as the .30 Army or .30 US, sometimes the .30 Gov't cartridge (not to be confused with the ".30 Gov't 06"). The 30-40 Krag was the civilian (or commercial) name of the cartridge.
It's like the 7.62x51 Nato cartridge and the .308 Winchester, or the 5.56x45mm and the .223 Remington. We don't talk about M-14s or M-60s being chambered for the .308, or M-16s chambered for .223.
I know, I know, it's nit-picking. I just thought it was funny that the military weapons were labeled "caliber .30-40 Krag" and the one civilian weapon of that caliber was labeled ".30 Army). I hasten to add, however, that the 1895 Winchesters were often marked ".30 Army."
Yes, they are. Different names for the exact same cartridge.
Gary, what difference were you trying to explain to them?
Thought I'd responded to Mike's post last night, but I guess the reply got sidetracked into that vast wasteland of endlessly wandering posts!