Hello all. I am trying to gather info on the Leupold 8.5-25x50 scope. The ERT seems to have a front focal? The LRT doesn't. I am not sure what that is and its utility. Second question, what is the standard target knobs and reticle that I would find most useful for paper punching at distance up to 1000 yards and occ long shot on game, if I become proficient.