Thanks for the info. I am not a .277 fan but is because of yoyos up here who rave about the .270 Win being the best thing in the world since sliced bread. Acording to them nothing else is close. BUT we are not talking about the Winchester are we. If sighted in at 2.35" at 100 what is the trajectory? That is what the computer program gave for the .366 if I wanted a 6" point blank range with a 250 grain bullet. One of my customers had me build a 6.5/8mm Mag. really impressive but very, very bad for the meat hunter, real big mess. He shot a deer in the front shoulders and said the meat was blood shot up into the neck.
You must run into the same thing unless you use bullets such as Swift or Barnes.
A few questions, do you need forming dies and what do you use as a firing forming load? One more question. Is your father Willis Ball? If so PLEASE thank him for the excellant article he wrote about the .366 D.G.W. Give me a call, lets talk some time.