Since this discussion moved into a meaningful essay on .30 v. .26:
For Doc Spears:
Have you messed with 140ish grain bullets in .308 @ 800 meters to see if the bullet weight is making the difference in perceived hitting power?
Or is it merely cross section area creating the bigger splash and clank?
My stalwart 5R gave me a reason to go to the gun doctor for major repairs. (Recycled M-240 and M-60 brass can FOAD)
So my FN SPRA1 is pinch hitting as my new primary. In any case, it puts me in the position of possibly changing the 5R to 6.5CM while on the bench.
I have a stock of .308 ammo and a couple other sticks so chambered. The 6.5 would be a new addition. But I am in Montana where we don't even talk about wind unless it is over 15-20 mph. Or it is dead still, which is also a rare condition.
I do not reload, so factory ammo is a given.