the 30-06 has enough energy out to 450 maybe 500 yards, but hitting the actual target out there is something else all together. if i was going for the real long shots i would get some federal HE or some hornady lightmags in a 180gr bullet, but the 150 will do fine for closer in shots, ie under 400yards. make sure that both you and the gun can hit those targets though

propmahn
save the world, reload your brass