I definitely snorted the dust and drank the kool-aid 2-3 years ago. I'm going into my 5th year of hunting and wanted to tinker with my set up after getting **** penetration my first two years. To preface, my draw is 26.5" which blows, but here is my experience:
Year 1; 400 gr with expandable 60lb draw, shot 30yds at a doe and got like 8" of penetration, luckily dropped her
year 2; 425 gr with stinger 60lb draw, shot 3 deer sub 10 yds barely got pass throughs
year 3; bumped up to 588 gr and switched to cutthroat single bevel 64lb draw, shot a doe at 20 yds with a complete pass through and buried in the dirt 5 yds past where she stood. this made me a believe.
year 4; 520 gr with cutthroat, took a **** shot (not happy about) on a deer 64 lb draw, had to make a follow up through the front of chest from the ground at 20 yds, blew through the entire length of the body.
I think I found a happy medium and could probably go a little lighter but I'm confident with what I have which I think is important. I think the bump in weight is important for people with short ass draws like myself.