I haven't tried the VLD's, but the classic hunter 7mm. Shot my buck last fall at 50yrds, impact vel was at least 2900. He was 1/4ing away the bullet poked through the 1st rib took large parts out of the next 2 ribs, ripped the bottom off both lungs deflated the heart (think empty sack). and every artery in his chest was cut. I found 1 piece of jacket in the off side shoulder, with no exit. That's what I expected with a high impact velocity. He stumbled around in circles for about 5sec which is to be expected without taking out CNS, or bone structure.
I suspect that for what ever reason the tip opening may have been a touch to small to allow for proper expansion. What you can do is go through your bullets trying to insert a small paper clip or a large staple in the tip, and set aside those that the paper clip will go in for hunting. I do this for the warm fuzzies.
Or which I really doubt you got a box of target VLD's in a box coded for hunting.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.