I completely agree it should be more than 1/4" dents. My spotter saw the hits as did I see big white puff clouds, I'm loading up more rounds tomorrow and I'll be doing it again real early in the morning so my target camera doesn't over heat and I can get a good look at the impacts. When looking at the cinder block it looks like actual hits, not ricochet but hey I could be wrong. I'm sure some copper solids will do the trick, they are non expanding unlike the Bergers.
Thanks oceanbob! The 338 is my favorite rifle so far, lots of fun!