There is a shooting sport where you shoot at metallic targets out to 550 yards in 100 meter increments starting at 200 ,meters. The 308 dominated for years, when the 7/08 came on the scene, it was all to obvious to all of us that the 7/08 had much less bullet drop and wind drift than our 308's had. So, the 7/08's replaced the 308's. Now, the 260 Remington is sought after by many due to it's lack of wind drift and bullet drop. Remington makes few if any 260 in the Varmint variety anymore.
The 7mm 150g Nosler ballistic tip(BC ~.500) at 2850 out of a 24" factory tube really shows out at 400 and 500 meters. I shoot a max load of R#19 with a fed 215 in my Rem factory tube. The Nosler bullets are reasonable in price to where you can afford to shoot a bunch of them.
With the 308's, you really need to go with an ultra high BC bullet vs normal bullets to cut down on your wind drift and bullet drop, if you are shooting long distance.