I harvested 4 whitetails last season with my 14" 7TCU and 120 grn Nosler BT running at about 2300 FPS. my closest shot. 15 yards was a pass through with a nickle size exit. My fartherst 135 yards dropped in it's tracks with no exit and the shoulder was almost a total loss. I would think that you might get a little more velosity out of the 7-08 due to powder capacity, but the shorter barrel might slow you back down a little. You just need to find out how fast your load shoots and find a bullet that will hold up to that velocity at impact ...