From what I have seen with the the Berger VLD's is that the expansion is very inconsistant on game if the velocity isin't kept pretty high , I have had good results with the 155gr VLD's out of a 308 pushed at max pressure about 3150fps on deer out to 300yds rapid expansion !! but the 175grs iden't seem to expand at all except once then it blew a big hole.
I think that the tiny hollowpoint and long ogive don't allow the bullet to start to open easly but at the high velocity the jacket is thin and soft enough to deform and start expansion.
the next problem is that I have only ever found one load that the VLD's shot well at max pressure and that is from the mentioned 308.
I give the Sierra Match Kings a try then the 100-115gr Ballistic tips. Or the new Nosler 110gr Accubond.
I have use the Berger VLD extensively on game and have had extremely good results. I have been the spotter or shooter on over 70 deer and antelope with those bullets and have never seen what I would call a bullet failure.
I have also shot over 100 coyotes with them and have never seen one to fail to open even on a 25 lb coyote.
A friend of mine took a 6-284 to Africa loaded with 105gr VLDs and it worked superbly on plains game up to and including eland. I saw the video of the hunt and there is no question he had enough gun and bullet.
If I was going to hunt with a 25-06 (great cartridge) the 115 Berger VLD would be my personal #1 choice.