Now that my .223AI is put together, I'm looking to develop a good load for it. From what I've found Varget and RL15 are the two most popular choices. It seems I see more loads with the RL15 though. I think I remember seeing something somewhere once where people were talking about RL15 giving them higher velocities than Varget before they got pressure signs. Right now I'm using Varget to fireform my cases, but I'll be buying some powder soon and I'm just curious about the pros and cons of these two powders. I'm shooting 75gr AMax out of a 22" Lilja barrel.