Looks like text book performance to me.
If your textbook is old enough. Perfect performance, 1920-1980 style.
No exit wound when using a 280 on a mere deer? Sorry, not good enough. Not even sort of.
A lot of nonsense gets written on the internet... this takes the nugget of the month prize.
It's gotta come close.
My most recent Barnes mono, pulled out of a cow caribou, 120 TSX 7mm-08.
A year previous, a moose hunt; 235 TSX, 375-350 Rem Mag.
Second from left was the very first Barnes mono I fired at an animal, a 225 grain XFB that which hit a broadside moose, the 340 Weatherby breaking big bones in both shoulders.
Anyone who can't kill an animal with a bullet retaining better than two-thirds of it weight is doing something(s) wrong. I see nothing that the TBBC did wrong that my saved monos did better.