Read up on Ballistic Coefficient.
No need. I know more about Ballistic Coefficients than you will ever know.
And for your information, Ballistic Coefficient has no effect upon accuracy other than the decreased bullet drag which potentially decreases wind drift variability in a variable wind velocity condition. In a constant wind, only precision is affected, not accuracy. If you don't know the difference between precision and accuracy, why are you writing about external ballistic matters?
It is recommended that you read and study the books "The Bullets Flight from Powder to Target by Franklin W. Mann and "Rifle Accuracy Facts" by Harold R. Vaughn. Then we can have an informed discussion.