Please tell me some more about your 'experience', MeanV... I mean it's so
fascinating.
I killed a few rabbits with willow switch arrows back in the 50's that probably weighed less than 400 grains, but I was only about 5 or 6 years old at the time. By the time I was 10, which was still 6 years before Allen got his patent on the compound bow, I was shooting 45 pounds and store-bought cedar arrows, which I would guess weighed up around 500 grains but I'd never heard of anything like grain scales back then, so I don't have a clue what they weighed.
Anyway, I believe I can truthfully say 400 grain arrows won't keep kids out of the woods if they really want to, as your compadre bowdoc is trying to say. Darn sure didn't keep ME from it.
I've spent my whole life shooting and hunting with bows and arrows, as well as with guns, and I'm sure there's precious little about archery I don't know or haven't tried. But thanks for asking.