Be honest: have you even read what is being talked about on the 223 thread? I see you posted to it, but have you real all the conversation? If not, you don’t have much room to talk about what is or isn’t being said here.I believe in forums like this what would be reasonable is what should be talked about, not what is possible. You no idea who might be reading this.
Also, no one is suggesting moving down to 22LR or similar for bear. That’s a red herring to prove a bad point.
People are talking about using lower-caliber centerfire cartridges with optimized bullets, demonstrating how they perform in gel media, then proving based on use in game.