I don't have near as much experience as you do, but I'm going to say it depends. The 175 SMK seems to transition through that velocity range pretty well. We shot quite a bit at extended ranges with M24's and 118LR before I retired.
On the other hand I was shooting at ground squirrels one afternoon with 6.5 139 gr Lapua Scenars and after barely missing one a couple of time at about 1350 I saw one a ways out further.
Long story made short my shots hit all over the place. I went back to where the closer one had been sitting on a rock and was able to hit the rock repeatedly.
Rifle is a Surgeon Action with a Krieger 1 and 8 twist Heavy Varmint Taper. I've killed a bunch of prairie dogs between 800 and 1150 yards with that rifle.
