I’ve only shot axis arrows personally, but know more people that use fmj’S. Both are awesome but it seems the fmjs aren’t as forgiving on misses since the aluminum can bend. But you should have good arrow weight with either or. I personally wouldn’t hesitate to shoot either.
I switched from CE Maxima Reds to 5mm FMJ two years ago to get extra weight. I couldn’t be happier with to change. Started with 2 dozen shafts and still have 21. Two were busted by animals, one still lost behind target. I have yet to trash one by missing the target.
IMO, if you miss and hit something hard, it’s not going to matter if it’s a Axis or FMJ.