I have used Si MK 107 6.5 mm's on rodents at MV's about 3,400 from a 6.5-06. Nothing spectacular but no pencil stuff on 5-8 pound rockchucks. I found one 6.5 107 resting on soft dirt from a 450 yard shot that was bent into a shallow U shape with core intact. The 107 6.5 has a low FF, real pointy & is surprisingly good at longish ranges. Almost 1/4 of total bullet length of the front of the 107, 6.5 is hollow (void).
Some of the 175 gr. .308 Si MK's I have seen have closed hollow points - just guessing if this is intended for military use.
Found some .338 300 grain bullets in pristine condition except for rifling engraving at my old range after the snow melted. Some local guys used them to shoot elks with .338 Edge's.