I have an accumark coming in 338-378wby. I also got a great deal on 80 pieces of 30-378 as well as 80 pieces of 338-378. Is it possible to neck up the 30-378 and use it interchangeably with the 338-378 brass? As in can I load up 50 with the same powder, primers, bullets and expect the same acuracy from the loads with the necked up 30-378 and 338-378? I am also looking for a hunting bullet to use out to 1000. Any recomendations? Deer, black bear, elk and moose.