You've learned how to not shoot small groups, that counts for something. I think all information is worth the trouble even if it doesn't solve the problem because it makes identifying what does work easier.
I once read a quote attributed to Kent Duckworth, the "Worth" of Cosworth Engineering & Cosworth racing engines, who said "Don't read, you become misinformed." I think what he was saying is that you don't know the particulars of someone else's test of an idea unless it was conducted and reported in a rigorous scientific manner. Even then you may not know everything and it is best to test it yourself.
So when I'm told that lots of people have tried something and have not succeeded it tells me that it isn't an easy thing, but it doesn't tell me that it is impossible.
The obvious solution is for the bullet mfg's to make the HFC bullets in the desired caliber(s), but that is kind of a chicken and egg problem. Until there is a volume mfg of tight twist .257 and .277 chamberings it's going to be hard to convince the bullet mfg's to tool up to make bullets for them. So maybe this new .277 chamber is the first step in that direction. Those of us who've been around long enough can recall that 6.5 bullets used to be few and far between, and most were low performance designs. Now look at what is available in that bore size.
When I worked in the store between ourselves we jokingly called them "bullet-shell-heads" because it seemed that the correct term was never used by anyone......