Yes, I've experienced the effect you describe……I don't think this dynamic is necessarily associated only with the Berger's, and I've seen it occur with a variety of "popular" lead core hunting and target style bullets that are traveling at +3000FPS, connecting with game at the shorter ranges. I first experience it with 270W with a variety of different hunting bullets at 3000FPS back in the 70's. IMO, it's the trade-off one makes when shooting game at long range. That same bullet that can generally be accurately placed at close range in the center of "non-eatable" lung area to minimize meat damage may very well be the bullet that has the ballistic performance to retain its velocity/energy and effectively perform with desired expansion to cleanly kill game when placing the bullet in the broader vital area at long range.
The J4 Jacketed JLK 142gr bullets I use in my 6.5x284N will fragment, scramble, and suck out the lungs of deer at the shorter ranges…but….Look just like the "Deadliest Mushroom in the Woods" at 700+ yards with often DRT performance. Pick your poison!
With several dozen deer/antelope shot from 200 to 1200 yards this I have found the above to be the case. Below is one of several examples. This is a JLK 142'gr bullet(J4 jacket..G7BC .323) retrieved from the chest cavity of a quartering away Mulie at long range….The bullet retained 65% of its weight…….DRT.
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