We do not change the SD of a bullet of a given weight, but we can change the SD of a profile of a given weight, say a 150 gr. bullet. We make a bullet the exact shape of the 150 gr projectile, but we decrease the weight or increase the weight- thus a change in SD.

We will be focusing on increasing the SD of a given profile. By example if you currently shoot a 168 gr. Sierra Matchking in your 7mm Rem Mag, and we increase the weight of the bullet to 195 gr but maintain the profile we have changed the SD. What we have done is increase the SD from .298 to .343 in rough numbers.

With the minimized surface area of the heavy bullet we have not only increased the SD of the bullet but also substantially increased the BC of the bullet as well. This is the basis of our hypothesis.