I'm afraid there is one somewhat misleading piece of information on ballistic coefficients contained in one of the posts. As a rule of the thumb, all other factors being equal, the higher the bullet weight for a given style of bullet, the higher the ballistic coefficient. I checked the ballistic coefficients for a large number of commercially available .270 cal (.277 diameter) bullets from manufacturers such as Barnes, Nosler, Swift, Hornady, Speer, Sierra, and others. Without exception, within a givenbulletstyle, the higher the weight, the greater the ballistic coefficient. Thus, 150 gr bullets had greater coefficients the 140 gr, which in turn had greater coefficients than 130 gr bullets.

Of course if you compare a 150 gr round nose bullet to a 130 gr spitzer, the relationship no longer applies. Also, as pointed, out there is more to long range performance thanballistic coefficients. Muzzle velocity, down range retained energy suitable for the game you are hunting, and other factors come into play.