I have shot a lot of game with Bergers, enough if there was a real issue that it should have been no issue not only to have happen but to them repeat it to figure out the why.
One 210, that's all I've seen pencil with a super soft placement, still recovered the animal so know for a fact it did pencil and placement.
Even trying to push some envelopes to find the line of failure we have only been able to find a few examples of early opening where we could experiment and find the true cause, each time I've seen a very aggressive opening the jacket was being stressed. One gun I was able to have consistent access too proved it was just the lands were rough and the hunting bullet opened much quicker than in our other guns of the same cal, switched just that gun over to the target bullet and problem solved wound channels tightened up and exits were consistent.
I know of an example I've seen touted as a Berger blow up failure on this forum, I also borescoped the rifle and the throat was like alligator skin, there is no way it was not stressing a cup and core jacket, barrel was replaced and it was good to go again.
The first season the ELDX came out we hadn't made it half way through the season and discontinued shooting them because of how erratic they were, every gun that it was planned to test them through was changed back to the previous bullet with in the first few animals, feedback was swift which was shocking cause I was pretty pumped about them.