I am not saying Barnes are miracle bullets, nor are any other.
Barnes bullets have shot great in most all my rifles and I have had no performance issues. My experiences of game have been with 338, 375, and 416 cartridges. I have been very pleased with groups from .277, .284, .308, .323, .338, .375, .416. Again not a miracle bullet, but in my limited experience a darn good one.

People speak of the fouling. I have experienced as much or more copper fouling from Swift A-Frames than I did from the original X-bullet, from the same rifles. The A-Frame is a copper jacketed bullet. I like A-Frames also.
I think most any of the monolithic style perform similarly as to on game performance. The Barnes happened to be the first I tried and are still the first I try. But, I have no hesitation with Nosler, Federal, or Hornady versions if they shoot well in the particular rifle.