I'm pretty sure some of the Nitros are short-chambered. They're built tough, but pressures went up when the move was made from 2 1/2, 2 9/16 and 2 5/8 to 2 3/4" shells. I don't know how long it would take to shoot a Nitro loose with heavy, high pressure loads, but it's always better to err on the safe side.
RWTF's history is a bit skewed. Both the Brits and the French had done a whole lot of dying before we got into WWI. Less so in WWII. But in WWII, although we played a much more significant role in terms of our manpower commitment, the Brits (and the Russians) needed our production capacity as much as they did our young men.
