I am new to this whole long range thing, but am getting addicted just reading and listening to your posts. I currently shoot a remington 700 7mm RM (bone stock, besides the trigger being lightened to 2.2 lbs).I have taken some deer and 1 elk at around 500 yards, and am wanting to get a gun that shoots farther and a custom. I will be buying a 700 action to build a custom off of. After talking to a local gunsmith he talked me into going with a Shilen match grade barrel. Now for the caliber? I was originally going to go with a .300 RUM. Now after seing the .338 edge and 7mm AM, I want to make sure I go all out. I do have some reloading experience just with my 7mag though. What will be best for taking blacktail deer, mule deer and elk? Also what will be easiest to reload for? Should I go with a wildcat or just stick to a 7stw, 7rum, .300 rum, or .338 rum. Excuse me if these are dumb questions.