390 grain arrows are still 10 grains lighter than I'd even use on a mangey skunk. [:'(]
I take a lot of pains to make sure my arrows are spined correctly, have proper FOC, and are flying Straight!
Oh please! Is that not a given?? That is - well, should be, as I'll get to in a moment - standard operating procedure no matter what weight arrows you use.
Here we are again though with the tunnel vision and not seeing the whole picture. We cannot forget the masses who wouldn't know a cable yoke from a set screw when it comes to properly tuning a bow and have absolutely no clue what tuning an arrow means. Oh, they can take their bows to the shop to get them 'tuned'. Problem is, we know how much THAT is worth when the person who tunes the bow is not the same person that will be shooting it. Even if these tuning-challenged folks were to shoot the same setup you use, THINK.... If they don't have a clue on how to tune their equipment for the optimal performance YOU demand, how can you possibly expect them to have the results you get with ultralight arrows?
Can't you see the problem I have with making a blanket statement saying light arrows work with no qualifications? I should think it's so obvious I wouldn't have to slap you upside the head like this to make you see it!
I've long been a proponent of a 400 grain legal minimum arrow weight for hunting. Nothing I've seen of late has caused my opinion to shift one iota.