What WorksSAnd Why
What I'm getting at is that every caliber has a rather narrow range of bullet weights within which it delivers optimum performance. That fact brings us back to your .30/06 and the upcoming hunt for elk, mule deer and pronghorns. Realistically, the "working range" of bullet weights for the '06 is 150 to 180 grains, and there is no shortage of makes and styles of bullets in this weight group, as you'll see by thumbing through ammo-makers' catalogs. A ballistic hair-splitter might try to convince you that you need 150-grain loads for pronghorns and deer and 180s for elk, the logic being that the faster, flatter-shooting 150-grain bullet will serve you best for long shots at pronghorns, whereas the heavier bullet has the extra punch and penetration you want for elk. If such advice sounds profound in the gun shop, out in the real world the bitter fact of the matter is that rifles seldom send different bullet weights to the same point of impact without changing the sight setting. In other words, if your rifle is sighted-in with 180-grain bullets, 150-grain loads may hit a few-or even several-inches off aim. So keep it simple and stick with one bullet weight.