Quote Originally Posted by scope eye View Post
I also have a 6.5 WSM, I had no idea it was called a Leopard funny guy that I am I still like my 264 WinMag better, I like my belted cases.
Do the 25 or 6mm WSM have pet names?

Dean
So the speed I found for a 6.5 at 140 grains in a wsm is 3100 with a ballistic coefficient of somewhere around .585, where as a 7mm at 168 grain will shoot I think around 3200 (need to look at load data) with a bc if .625 with the exact same bullet.

Ballistically, the 7mm is superior in every way with that much powder I think. Although I haven't seen a comparison of accuracy at extended ranges and that's what matters.

I guess what I use to compare it to people is blowing through a coffee straw vs a drinking straw. To an extent you might be able to get something to go faster but eventually the pressure just gets to high in the small straw and the big straw will end up faster.