according to a ballistics calculator I have, a 150 grain pill from a 308 with a muzzle velocity of 2,820 fps is only going a little over 1000 fps at 1000 meters. someone stated the maximum distance a 308 will go was 4,470 yards my guess is by the time the bullet reaches 4,000 yards its probably only going 100 fps or even less LOL just enough to put a nice bruise on someone....... 8,000 meters BLAHAHAH