I have to also wonder why the OP had this trouble with multiple bullets in a repetitive fashion. I also suspect that a VLD or bedded seating stem will solve the problem. I make fully bedded seating stems for my rifles to be absolutely certain I am seating only off the ogive and in no way touching the tip.
It sucks to have to deal with shooting a game animal multiple times. I appreciate that you are considering and investigating why in an effort to not repeat that performance in the future. I am no fan boy of any particular bullet, they all have certain things they do better or worse than others. I put hundreds and hundreds of rounds into testing before they ever get a chance to chase game. The bullet is the cheapest part of the hunt, but has a heavy influence on my success, or failure. I test and recover impacts from 100 yards out to as far as I can expect to reliably hit. I'm not going to just drink the marketing koolaide and take other keyboard 'experts' results as gospel. I will test it, in my rifle in the conditions I use it in.
The results that the OP reports strongly suggests to me that there is some type of induced seating damage to the bullet. Either from the die or in the chambering process. One bullet failure is an unfortunate anomaly that gets through the personal screening process, maybe a tip plugged with polishing compound or jacket material down inside the hollow point. I have seen both of those things previously, and not just in Berger bullets. Two in a row is a trend and raises a big red flag that it's in the process it is going through any more in a row reinforce that something in the set up isn't right, or every one of the bullets he fired is flawed. The probability of six bullet failures in a row all ending up in the same box, and then the same magazine, regardless of bullet brand, is beyond minimal without some sort of consistent damage to the bullet being induced by the end user. Before you just change bullets take a good look at what you have going on. Carefully measure a bullet check the internal tip cavity and photograph it. Seat it into a case as usual and measure it and check the tip cavity and photograph it again. Chamber it from the magazine measure it check the tips and photograph it. Pull the bullet out and check the tip cavity, measure and photograph. Compare your notes and photographs the problem is in there someplace, and just changing bullets won't likely solve it on its own.
