I JUST built a 358 from a savage 110. I went with a 20" barrel, 1x12 twist. I'm shooting Hammer 215 HHT. I'm getting 2516 FPS, and just under an Inch at 100 yards over 3000 pounds of energy. I shot a 4x4 whitetail at 265+ yards. It was in very thick cover, but standing in a small clearing where I could see its shoulder and the front part of the ribs (lungs). I chose to take out the shoulder to stop it from running into the thick brush. It hit just where I hoped, and the deer fell to the ground and never twitched. When I got to it, I could see the bullet crushed the on side shoulder and the same to the off side on its way out. When we dressed it out, both lung tops, the heart top where completely mush. SO MUCH BLOOD. I'm positive IF it had run the blood trail would have been easy to follow. Is it Better than a 308? Maybe not, but the results definitely made me a believer that it's at least as good.