Your arrows will actualy group better with field points with the higher weight foward(more stable.) as long as you are spined correctly. If the tip is too heavy this could increase your pile weight and actually underspine the arrow. I have studied Newtons laws and he states that an arrow flies its best at 10% weight foward. I used this because I figured that he probably knows a little more than me. The more weight foward the faster the arrow will drop. If you want to get even more into it. The drag co-efficient of the veins has alot to do with it also. I actually figured that if I went with a heavier arrow, with the correct drag co-efficent and 10% weight foward. I would still be effective on the 3-D range shooting at 275 fps, because I was minimizing my arrow drop. As for hunting this also helped as I can easily tune fixed blade broadheads to fly at these speeds with minimal effect of planing. The more the arrow is diving the more the effect the air will have on it.