I have a switch barrel rifle that I would like to get a barrel for to shoot a mile. Once I have achieved that lifelong goal, I would like to be able to use the barrel in a long range hunting situation. There are reasons that are numerous that limit me to a 300 win mag, so changing caliber is not an option, and no it was not my first choice for this task. It looks like I would have to push a Hornady ELDM 225 or equivalent at around 2900 to safely get to a mile without getting too far into the transonic range. I am looking for some input on how realistic that goal is (225 going 2900) I am prepared to go 28 inches on the barrel if I have to. Advice on barrel length, twist, profile and powder that others are using for that distance would be a great help. Thanks in advance.