What was your impact velocity?
Is the rifle a 1 in 10 twist? if so, Have you ever considered trying a heavier Hybrid ogive bullet like maybe a 215? I have found the hybrids pass to sub sonic and stay truer than a VLD in my research.
Those bullets are typical of what I have seen from bullets impacting dirt when impact velocities are below 1000 fps. But they still expand on the steel or a rock, as shown from the splash from your hit. Did you recover the jacket from the hit? It should have been there on top the ground.
You are really getting after it these days. Have you got the itch for a 338 yet?