One of the factors to consider in "effective range",is the energy of the bullet.A commonly accepted energy level for deer size animals is 1100 ft-lbs.I will stay with Ron T's example of a 150 grains.That 150 gr bullet leaving the muzzle at 2600 feet per second generates 2250 ft-lbs.The bullet at 300 yards retains 1175 ft-lbs and at 400 yards is a marginal 928 ft-lbs.The bullet construction and speed at which a bullet will open or expand are also considerations.I consider the .300 Savage to be a 300 yard gun,with 350 yards being marginal.
