I know that it may not be worth it to change from non AI to AI , but , if starting from scratch, and building a new rifle cartridge barrel, would any of you start with an Ackley? The brass is the same cost, dies might be a little higher, but the life of the brass and improved ballistics would be aa plus right? This is a question, as i am looking at possibly building a 243AI and a 257 Roberts AI, and will reconsider if everyone thinks the gains aren't worth it...Thanks for any thoughts about this....rsbhunter