...and you only talk about how I need a 750 gr arrow to kill a deer.
There's that statement, "need to", again. I'm trying to find where anyone here said that. I know I haven't.
The heavier arrow does not kill faster or make the animal more dead. That's rediculous to say and I'm sure even the heavy arrow advocates will agree with me on that one.
It does if you hit a heavy bone and the heavy arrow gets through to the vitals. We both know that the light arrow has no chance on a bone of any significance. Are you denying that a heavy arrow can get through a bone that a light one can't? If so, re-read the link I gave you on the "bone-breaking" threshold. He isn't making this stuff up. It's true.