I find this to be very odd. Years ago, I used a 180BT in a 30-06AI to harvest 25 or so Whitetails. Some were shot from tree stands at
close range & some out a ways. I find this to be a good comparison because the SD of a 150gr 7mm BT & the SD for a 180gr. 30 cal.
to be very close to the same, plus the vel. for this load was a little over 2,900, so tit for tat results could be expected. Well, not really. You see, these BT bullets were the ones sold in boxes of 100 & said Solid Base Ball. Tips & to those that know, that means that these bullets were "softer" than the ones of today. But out of all of these Deer, NONE had this kind of entrance wound. Oh, some were violent, I knew I did not want that bullet for Elk, but ALL were quick kills & ALL penetrated to the vitals, even with much more resistance that this Fawn offered. Some had a large entrance, but only a fraction of this hole you show & I did have some large EXITS but not nearly this big.
Every time I have seen a big entrance, there is hair, a bunch of hair in the hole. This hole is below the white line, yet I don't see much hair, odd!
And the mist blew around to the offside legs, another oddity.
I suspect that if I tried to duplicate your result by shooting 100 Antelope I would probably never get such an entrance hole like this, but maybe 2 or 3 exit holes like this.
Yea, must be fluke
But then you shoot just 2 animals & had this issue with both both, yea faulty I guess.
In this thread or another forum you mentioned that you contacted Nosler. Please let us know what they say.