I just added a .45-70 to my collection and am in the process of getting the items to reload for it. It's a straight wall case ... are there carbide dies available for it? Since it's a straight wall case will I need to trim them? I've shot a lot of pistol and have never trimmed one yet (.38 Spec, .357 mag, .44 mag). Also what powders do you find work the best? Thanks in advance.