I read a book about HAthcock years ago. I believe it was 30-06 and .308 in combat.....as well as putting a scope on a m-2 .50 cal machine gun and taking some really long shots.

As for the 30-06 balistics mentioned earlier they were off. if you are 3 inches high at 100 yards you are about 7-11 inches low at 300 yards and 25-33 inches low at 400 yards. www.remington.com has a nice balistics section. Part of the challenge and pride in shooting some of these longer ranges is being able to judge the distance and accurately adjust for the range of your target. Good luck finding the tack driver you are after. I wouldn' t want to foot the bill.

David