I have never had an issue with 100 grain Thunderheads, though I have only killed 3 elk and a moose with them. Not big mature bulls at that.
I am however a KISS person and went to fixed blade heads as any moving parts other than the head itself just doesn’t give the warm/fuzzy and doubly so on elk sized critters with heavy bones. Mechanicals supposedly have come a long ways but I still don’t have any confidence in them. Of those you show, I’d choose the first one assuming it shot well.
I went to NAP HellRazors but haven’t shot a darn thing with them yet. Iron Will, while not totally fixed and tooth if the arrow may make an appearance on my arrows here soon.
