I had to think about that one too, but I'm guessing Remington Game Load.

At one time I had quite a collection of empty hulls, foreign and domestic. Maybe I chose the wrong ones, but ALL of those hulls, including the factory 2 3/4" variety, measured shorter than 2 3/4". The 2 3/4 were quite close to that, maybe just 1/16 or so shorter. But none longer.