Which would preform better at 600 yards? Going off of the Black Hills catalog it says the 69 grain SMK is 100 fps faster. This got me wondering which one would fight the wind better. I assumed the 77 since the BC is higher but when I saw the 69 was faster I wasn't sure. Anyone have any first hand knowledge on this? It will be fired from a Rem 700 with a 22 inch 1/8 twist barrel.