R R - There is not nearly enough diff in the 260 & 270 when you
use comparable S Ds & B Cs. Especially when the 270 starts out with so much more velocity. For whatever reason you & others are trying reverse or negate or deny the mathematical diff. The laws of physics are static.
Remember I'm not a 6.5 opponent, just realist.
Each to his own.
Happy Thanksgiving
Jerry