Alliant shows a Clay Dot 7/8 oz load in 2 3/4" hulls at 5100 psi. i use it in an old Damascus Charles Daly that somebody installed a long forcing cone 2 3/4" chamber in. Still have all my fingers. I talked to a Hogdon tech guy and he indicated that 2 1/2" shells have a much higher chamber pressure than do 2 3/4" shells with the same powder and charge due to the smaller explosion chamber. Makes one think of lengthening the chamber. Jim Pettengill
I've wondered if 2 3/4" using the same load would give lower pressure then 2 1/2". You see the pressure reduction with the same powder charge when going from 2 3/4" to a 3" in the loading data. My 2 1/2 has been chambered to 2 3/4, which I am not happy about, but maybe it will help with obtaining lower pressures.
