Was looking at a book last night that said to sight in a 338/378 Wthby at 400 yards for long range shooting. I currently have it set for 300 yards. Does anyone else agree with 400 yards? I have a Weatherby Accumark in 338/378, with a 3.5X15X50 Night Force scope. So far my longest shot has been a Moose at 787 yards. Ranged and dialed in. I shoot a 30-06 also and have shot it for years. I have it set for 300 yards, and it works well without having to dial the scope out to 350 yards.