fan
Been a fan for years, since I inherited my Grandad's M88 Win so chambered.
My other two are: a Savage Scout, and a Savage Hog. For a 6-7 yr span I was issued an M14 (semi only) as a "heavy" duty rifle. I had to give that one back when I aged out.
Why? Well, its an accurate cartridge, for one. Read somewhere that National Match scores using the '06 never did equal the scores shot by M14/.308 shooters. That could be due to a variety of factors, but is a researchable fact. My experience with the 3 rifles above supports it too.
Ballistically, in the field, I think there is not a bit of difference between the .308 and the '06. The 'o6 can gain a bit with heavy lugs due to its higher powder capacity. But with the short tubes common today in so many rifles, the .308 is not far behind, if not the equal, especially with the mid weight 147-150 grainers.
A wide variety of modern "tactical" SA rifles are commonly available in .308, as well as the common SA sporters. The only "tactical" 'o6 is the Garand, (well I guess the old BAR combat rifle) and its certainly a hero, but not cutting edge anymore. There are of course, a number of '06 sporters in all action types. But there is a wider choice, overall, in .308. And the .308's are available in true "short actions" which can yield a slightly lighter, more portable rifle.
Finally, for a reloader, its a bit (albeit a small bit) cheaper to shoot over the long run, than its .30 cal older brother. Powder charges are a bit lighter, so as to support the thought that "every 9th shot is free".( vs. the '06) And the days of cheap brass and surplus brass in '06 are fading,if not past , but occassionally you run up on such in .308. I will say at the local public range, before EVERYBODY began saving their brass, that '06 was the most common.
Hey, I own the same number of '06's, have nothing against anybody's favorite, but believe the .308 is versatile and practical.