Check the Berger and Sierra web pages for BC numbers.
I think it is the BC permitting less drop in the v part of 1/2 em vee squared that does the trick over the mass difference. Flatter flight always means higher velocity, as compared to the momentum of a round just dropped simultaneously from the trigger guard, eh?
Thanks -- I did. The data was pretty interesting. I see why our snipers use .338
I wish I was younger with a lot of time and money, and I could really enjoy putting the data into fun experiments. I did work out some things using the lessons in the Lyman volume, but that was years ago. I chose the 168 gr Sierra HPBT for shooting with my M-1 at short distances (200 yd)
Thanks for taking the time. I see why the 6.5 mm is a good choice for target & hunting.