WTS, nobody in his right mind would suggest using modern (think SAAMI standard) 2 3/4" loads in a 2 1/2" chamber. The learning has been, and remains, that low pressure loads in 2 3/4" hulls have minimal pressure increase in a 2 1/2" chamber, especially with a known 1" cone. If you are not sure of a load's pressure, don't shoot it. If you have any doubts, order Vintager type 2 1/2" loads. However, for maximum economy and convenience, roll your own using loading manual low pressure loads in compression formed 2 3/4" hulls.