I think it would have to be determined by the conditions that you hunt in. If you are hunting in areas that are wind protected like firebreaks through the woods and such, the Swift will have a flat trajectory and make hitting at distance easier. If you hunt somewhere windy, then the .25-06 with heavier bullets will leave the Swift in its wake, and still shoot very flat.
I got a dose of this when I went to Texas a few years ago with a .223. I bought a .243 after that.
