if they would be confident in a clean kill up to about 350ish with that light of a bullet...assuming it hits the mark.
Look at your ballastic charts. With Barnes or any copper bullet as long as they are still moving at 2000 fps or faster when they hit game they will give you good expansion and penetration. You cannot push one fast enouth, even the lightweights, to get it to break up at close range. They are a better choice at close to moderate range because of this. At longer ranges where velocity has dropped off a more traditional bullet will still expand at much slower speeds. They are not the best choice at longer ranges, but I'd guess you are still above 2000 fps at 350 yards. If so I'd use them with confidence.