What is the \"McDonald/Almgren approach\" What is the "McDonald/Almgren approach" I was recently informed that using the cosine math factor for correcting the true horizontal distance was flawed and that the "McDonald/Almgren approach" would be more accurate. So much better that it may be the difference of me missing with my method and a hit with that method. I agree that only considering the cosine corrected yardage may be flawed by the fact it doesn't account for time of flight which I believe at really long range like 2000 yards at a really extreme angle it must have some affect. example: 2000 yards at a 95 degree angle verses 200 yards at the same 95 degrees. It's hard to believe that the exact same cosine correction fact would apply. Any comments on the subject would be appreaciated.