ORIGINAL: jeepkid
ORIGINAL: Worc
They would be pretty close in flattness from factory loads. Here are the flattest factory loads for each from my ballistic calculator. I also threw in a .270 WSM load too.Notice the .300 has more KE also.
http://img.photobucket.com/albums/v701/Worc/WSM.jpg
Your not comparing the same weight bullet...so of course the .300 would have more energy...
Your argument would hold water if you were referring to sectional densities and ballistic coefficients.