I'm building a .284 for long range paper punching and general fun. I'm tempted to buy the Lupua brass and neck it up, but I have no experience necking anything up or down. I'll be using Forster Bench rest dies, not bushing dies. Will it be as easy as running it through the die? Will I have to fire form the brass? Should I just stick to the Winchester brass designed for the "straight" .284? Thanks.