No experience with the XLCs, but I used 210 gr XBT bullets in my .338 Win mag on a cow elk hunt in Colorado in 1996. They shot 1 inch at 100 yards, and I killed my first elk at about 75 yards with a shot through the shoulders and heart. The heavy shoulder bones were not hit, and I didn't know that I had an exit wound until a thin drop of blood began to ooze from the far shoulder during field dressing. I could barely poke my finger into the exit wound. There was no blood trail, but she went head over heels after about a 50 yard dash. She was about 2 miles and several hundred feet lower elevation from the truck. This Missouri boy earned his first elk on the pack out on that day.