I use the 165 GR. Winchester silvertips. I read somewhere that each caliber has a thing called ballistic coefficient. It has to do with the length of the bullet compared to the caliber. I think I read somewhere that in a .30 bullet 165 has the best BC. Anyone heard of that?

Here's a link http://www.chuckhawks.com/bc.htm

Reading this there's alsothing called sectional density. Another factor is the shape of the bullet, specifically pointed bullets. they seem to greatly affect the BC of a bullet. If you look at the figures he's listed he shows the 165 grain pointed bullet has a better BC than 150 grain bullet of the same shape. The difference in longe range trajectory seems to be significant.


GH