Hello guys first post here on the forum. Recently I have decided to build my own custom rifle. The rifle is going to be based on a Defiance Action, Jewell Trigger, And Krieger Barrel, And Mcree Stock. I want this rifle to be my first long range rifle. I am in the process of building a 800 yard range on my other property. I am just having a very difficult time trying to decide what cartridge to go with. The gun is going to be heavy so this will just be a target rifle. Please help me make up my mind. I will be reloading so that will not be an issue. I am not limited by long or short actions. Thanks for reading ! Please give me some input !