I just shot a ladder with my .338WM shooting the 180 gr NABs. At 200m, I had consecutive rounds go into a sub 1/2 inch group. I have not had time to go shoot confirmation groups as it is now deer season; however, if all you will be shooting is WT deer, the 180s is all you need. I will have to chrono the loads next time I go to get velocities too. If you are wanting to reach out beyond 4-500 yards, then the 225 gr NAB will offer better ballistics to go along with performance. If you were planning on shooting at longer ranges with a .338 WM, I would look more towards the 250 gr SMK. That would give you much higer bcs to work with. Even the 250 SGK would be a fine choice.