Another thumbs up for ANY of the FMJ arrows if penetration is you #1 goal.
I'd not worry about them bending on you unless you are UNUSUALLY HARD on your arrows. Just treat them like you treat any other arrow and they will be fine.
Others I know that have or do use them have the same opinion locally. I've never heard a single negative word against them......other than online but the shaft that DOESN'T have negative reviews online does not exist. (IMO)
I used them a couple years and only switched because I didn't feel the weight was necessary for ONLY whitetail, which is all I have here, after I gave my remaining arrows to a friend going elk hunting. #payitforward.
If I was going Elk hunting, they would be the shafts I'd be fletching. No questions asked other than 6mm or 5mm, but honestly I don't think it would matter a tinker's d@mn, just would be a personal "I wanna try this diameter" kinda thing. Either would work awesome.
High FOC is a good thing but it's hardly mandatory. With or without, these arrows penetrate, period.....or at least did for me and do for those I know.
Just awesome shafts, IMO.......2 cents
God Bless.