I think I am now understanding at least one thing you are saying and a possible divergence in the reasoning in the two sides of the discussion.
Are you saying, you trust ballistic gel because it is a repeatable medium to see how a bullet deforms and acts in terminal performance, because there are too many variables in actual animals. So it is the only thing we can trust.
I agree with that if you compare 5 shots fired into ballistic gel balanced against 5 shots into animals. The gel allows for a conclusion from a smaller sample, than the anecdotal evidence.
Those who are disagreeing, including myself, will actually agrees with you, and reach another conclusion, based on the absolutely massive data set collected as evidence in the .223 thread. That thread solved the problem with the variability of shooting bullets into live animals with the many variables with a huge sample size.
Marketers will use a "focus group" which is a small representative sample of consumers (ballistic gel) to test a product. But, nothing is better than seeing aggregated sales to consumers.
In the end, the .223 thread has factually established what a 77 tmk will do. Whether that is the "best bullet" to use becomes a personal decision balancing factors like meat damage and personal preference.
robtatto is more blunt with his comment, but I 100% concur. Your position is missing discussion of the .223 thread, and frankly, if you read that, you should be convinced by the evidence.
BACK to the thread topic,
I think I am now going to build a .223 "bolt action" upper. I have always thought they were cool since I saw the lightweight/lightweight thread.